[YouTube] Revert forcing player JS by default

* still leaving the parameters in place

thx bashonly for confirming this suggestion

test/helper.py

@@ -85,10 +85,10 @@ class FakeYDL(YoutubeDL):
         # Silence an expected warning matching a regex
         old_report_warning = self.report_warning
 
-        def report_warning(self, message):
+        def report_warning(self, message, *args, **kwargs):
             if re.match(regex, message):
                 return
-            old_report_warning(message)
+            old_report_warning(message, *args, **kwargs)
         self.report_warning = types.MethodType(report_warning, self)
 
 
@@ -265,11 +265,11 @@ def assertRegexpMatches(self, text, regexp, msg=None):
 def expect_warnings(ydl, warnings_re):
     real_warning = ydl.report_warning
 
-    def _report_warning(w):
+    def _report_warning(self, w, *args, **kwargs):
         if not any(re.search(w_re, w) for w_re in warnings_re):
             real_warning(w)
 
-    ydl.report_warning = _report_warning
+    ydl.report_warning = types.MethodType(_report_warning, ydl)
 
 
 def http_server_port(httpd):

test/test_traversal.py

@@ -9,21 +9,32 @@ import unittest
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 
+import itertools
 import re
 
 from youtube_dl.traversal import (
     dict_get,
     get_first,
+    require,
+    subs_list_to_dict,
     T,
     traverse_obj,
+    unpack,
+    value,
 )
 from youtube_dl.compat import (
+    compat_chr as chr,
     compat_etree_fromstring,
     compat_http_cookies,
+    compat_map as map,
     compat_str,
+    compat_zip as zip,
 )
 from youtube_dl.utils import (
+    determine_ext,
+    ExtractorError,
     int_or_none,
+    join_nonempty,
     str_or_none,
 )
 
@@ -446,42 +457,164 @@ class TestTraversal(_TestCase):
                          msg='`any` should allow further branching')
 
     def test_traversal_morsel(self):
-        values = {
-            'expires': 'a',
-            'path': 'b',
-            'comment': 'c',
-            'domain': 'd',
-            'max-age': 'e',
-            'secure': 'f',
-            'httponly': 'g',
-            'version': 'h',
-            'samesite': 'i',
-        }
-        # SameSite added in Py3.8, breaks .update for 3.5-3.7
-        if sys.version_info < (3, 8):
-            del values['samesite']
         morsel = compat_http_cookies.Morsel()
+        # SameSite added in Py3.8, breaks .update for 3.5-3.7
+        # Similarly Partitioned, Py3.14, thx Grub4k
+        values = dict(zip(morsel, map(chr, itertools.count(ord('a')))))
         morsel.set(str('item_key'), 'item_value', 'coded_value')
         morsel.update(values)
-        values['key'] = str('item_key')
+        values.update({
-        values['value'] = 'item_value'
+            'key': str('item_key'),
+            'value': 'item_value',
+        }),
         values = dict((str(k), v) for k, v in values.items())
-        # make test pass even without ordered dict
-        value_set = set(values.values())
 
-        for key, value in values.items():
+        for key, val in values.items():
-            self.assertEqual(traverse_obj(morsel, key), value,
+            self.assertEqual(traverse_obj(morsel, key), val,
                              msg='Morsel should provide access to all values')
-        self.assertEqual(set(traverse_obj(morsel, Ellipsis)), value_set,
+        values = list(values.values())
-                         msg='`...` should yield all values')
+        self.assertMaybeCountEqual(traverse_obj(morsel, Ellipsis), values,
-        self.assertEqual(set(traverse_obj(morsel, lambda k, v: True)), value_set,
+                                   msg='`...` should yield all values')
-                         msg='function key should yield all values')
+        self.assertMaybeCountEqual(traverse_obj(morsel, lambda k, v: True), values,
+                                   msg='function key should yield all values')
         self.assertIs(traverse_obj(morsel, [(None,), any]), morsel,
                       msg='Morsel should not be implicitly changed to dict on usage')
 
-    def test_get_first(self):
+    def test_traversal_filter(self):
-        self.assertEqual(get_first([{'a': None}, {'a': 'spam'}], 'a'), 'spam')
+        data = [None, False, True, 0, 1, 0.0, 1.1, '', 'str', {}, {0: 0}, [], [1]]
 
+        self.assertEqual(
+            traverse_obj(data, (Ellipsis, filter)),
+            [True, 1, 1.1, 'str', {0: 0}, [1]],
+            '`filter` should filter falsy values')
+
+
+class TestTraversalHelpers(_TestCase):
+    def test_traversal_require(self):
+        with self.assertRaises(ExtractorError, msg='Missing `value` should raise'):
+            traverse_obj(_TEST_DATA, ('None', T(require('value'))))
+        self.assertEqual(
+            traverse_obj(_TEST_DATA, ('str', T(require('value')))), 'str',
+            '`require` should pass through non-`None` values')
+
+    def test_subs_list_to_dict(self):
+        self.assertEqual(traverse_obj([
+            {'name': 'de', 'url': 'https://example.com/subs/de.vtt'},
+            {'name': 'en', 'url': 'https://example.com/subs/en1.ass'},
+            {'name': 'en', 'url': 'https://example.com/subs/en2.ass'},
+        ], [Ellipsis, {
+            'id': 'name',
+            'url': 'url',
+        }, all, T(subs_list_to_dict)]), {
+            'de': [{'url': 'https://example.com/subs/de.vtt'}],
+            'en': [
+                {'url': 'https://example.com/subs/en1.ass'},
+                {'url': 'https://example.com/subs/en2.ass'},
+            ],
+        }, 'function should build subtitle dict from list of subtitles')
+        self.assertEqual(traverse_obj([
+            {'name': 'de', 'url': 'https://example.com/subs/de.ass'},
+            {'name': 'de'},
+            {'name': 'en', 'content': 'content'},
+            {'url': 'https://example.com/subs/en'},
+        ], [Ellipsis, {
+            'id': 'name',
+            'data': 'content',
+            'url': 'url',
+        }, all, T(subs_list_to_dict(lang=None))]), {
+            'de': [{'url': 'https://example.com/subs/de.ass'}],
+            'en': [{'data': 'content'}],
+        }, 'subs with mandatory items missing should be filtered')
+        self.assertEqual(traverse_obj([
+            {'url': 'https://example.com/subs/de.ass', 'name': 'de'},
+            {'url': 'https://example.com/subs/en', 'name': 'en'},
+        ], [Ellipsis, {
+            'id': 'name',
+            'ext': ['url', T(determine_ext(default_ext=None))],
+            'url': 'url',
+        }, all, T(subs_list_to_dict(ext='ext'))]), {
+            'de': [{'url': 'https://example.com/subs/de.ass', 'ext': 'ass'}],
+            'en': [{'url': 'https://example.com/subs/en', 'ext': 'ext'}],
+        }, '`ext` should set default ext but leave existing value untouched')
+        self.assertEqual(traverse_obj([
+            {'name': 'en', 'url': 'https://example.com/subs/en2', 'prio': True},
+            {'name': 'en', 'url': 'https://example.com/subs/en1', 'prio': False},
+        ], [Ellipsis, {
+            'id': 'name',
+            'quality': ['prio', T(int)],
+            'url': 'url',
+        }, all, T(subs_list_to_dict(ext='ext'))]), {'en': [
+            {'url': 'https://example.com/subs/en1', 'ext': 'ext'},
+            {'url': 'https://example.com/subs/en2', 'ext': 'ext'},
+        ]}, '`quality` key should sort subtitle list accordingly')
+        self.assertEqual(traverse_obj([
+            {'name': 'de', 'url': 'https://example.com/subs/de.ass'},
+            {'name': 'de'},
+            {'name': 'en', 'content': 'content'},
+            {'url': 'https://example.com/subs/en'},
+        ], [Ellipsis, {
+            'id': 'name',
+            'url': 'url',
+            'data': 'content',
+        }, all, T(subs_list_to_dict(lang='en'))]), {
+            'de': [{'url': 'https://example.com/subs/de.ass'}],
+            'en': [
+                {'data': 'content'},
+                {'url': 'https://example.com/subs/en'},
+            ],
+        }, 'optionally provided lang should be used if no id available')
+        self.assertEqual(traverse_obj([
+            {'name': 1, 'url': 'https://example.com/subs/de1'},
+            {'name': {}, 'url': 'https://example.com/subs/de2'},
+            {'name': 'de', 'ext': 1, 'url': 'https://example.com/subs/de3'},
+            {'name': 'de', 'ext': {}, 'url': 'https://example.com/subs/de4'},
+        ], [Ellipsis, {
+            'id': 'name',
+            'url': 'url',
+            'ext': 'ext',
+        }, all, T(subs_list_to_dict(lang=None))]), {
+            'de': [
+                {'url': 'https://example.com/subs/de3'},
+                {'url': 'https://example.com/subs/de4'},
+            ],
+        }, 'non str types should be ignored for id and ext')
+        self.assertEqual(traverse_obj([
+            {'name': 1, 'url': 'https://example.com/subs/de1'},
+            {'name': {}, 'url': 'https://example.com/subs/de2'},
+            {'name': 'de', 'ext': 1, 'url': 'https://example.com/subs/de3'},
+            {'name': 'de', 'ext': {}, 'url': 'https://example.com/subs/de4'},
+        ], [Ellipsis, {
+            'id': 'name',
+            'url': 'url',
+            'ext': 'ext',
+        }, all, T(subs_list_to_dict(lang='de'))]), {
+            'de': [
+                {'url': 'https://example.com/subs/de1'},
+                {'url': 'https://example.com/subs/de2'},
+                {'url': 'https://example.com/subs/de3'},
+                {'url': 'https://example.com/subs/de4'},
+            ],
+        }, 'non str types should be replaced by default id')
+
+    def test_unpack(self):
+        self.assertEqual(
+            unpack(lambda *x: ''.join(map(compat_str, x)))([1, 2, 3]), '123')
+        self.assertEqual(
+            unpack(join_nonempty)([1, 2, 3]), '1-2-3')
+        self.assertEqual(
+            unpack(join_nonempty, delim=' ')([1, 2, 3]), '1 2 3')
+        with self.assertRaises(TypeError):
+            unpack(join_nonempty)()
+        with self.assertRaises(TypeError):
+            unpack()
+
+    def test_value(self):
+        self.assertEqual(
+            traverse_obj(_TEST_DATA, ('str', T(value('other')))), 'other',
+            '`value` should substitute specified value')
+
+
+class TestDictGet(_TestCase):
     def test_dict_get(self):
         FALSE_VALUES = {
             'none': None,
@@ -504,6 +637,9 @@ class TestTraversal(_TestCase):
             self.assertEqual(dict_get(d, ('b', 'c', key, )), None)
             self.assertEqual(dict_get(d, ('b', 'c', key, ), skip_false_values=False), false_value)
 
+    def test_get_first(self):
+        self.assertEqual(get_first([{'a': None}, {'a': 'spam'}], 'a'), 'spam')
+
 
 if __name__ == '__main__':
     unittest.main()

test/test_utils.py

@@ -69,6 +69,7 @@ from youtube_dl.utils import (
     parse_iso8601,
     parse_resolution,
     parse_qs,
+    partial_application,
     pkcs1pad,
     prepend_extension,
     read_batch_urls,
@@ -664,6 +665,8 @@ class TestUtil(unittest.TestCase):
         self.assertEqual(parse_duration('3h 11m 53s'), 11513)
         self.assertEqual(parse_duration('3 hours 11 minutes 53 seconds'), 11513)
         self.assertEqual(parse_duration('3 hours 11 mins 53 secs'), 11513)
+        self.assertEqual(parse_duration('3 hours, 11 minutes, 53 seconds'), 11513)
+        self.assertEqual(parse_duration('3 hours, 11 mins, 53 secs'), 11513)
         self.assertEqual(parse_duration('62m45s'), 3765)
         self.assertEqual(parse_duration('6m59s'), 419)
         self.assertEqual(parse_duration('49s'), 49)
@@ -682,6 +685,10 @@ class TestUtil(unittest.TestCase):
         self.assertEqual(parse_duration('PT1H0.040S'), 3600.04)
         self.assertEqual(parse_duration('PT00H03M30SZ'), 210)
         self.assertEqual(parse_duration('P0Y0M0DT0H4M20.880S'), 260.88)
+        self.assertEqual(parse_duration('01:02:03:050'), 3723.05)
+        self.assertEqual(parse_duration('103:050'), 103.05)
+        self.assertEqual(parse_duration('1HR 3MIN'), 3780)
+        self.assertEqual(parse_duration('2hrs 3mins'), 7380)
 
     def test_fix_xml_ampersands(self):
         self.assertEqual(
@@ -895,6 +902,30 @@ class TestUtil(unittest.TestCase):
             'vcodec': 'av01.0.05M.08',
             'acodec': 'none',
         })
+        self.assertEqual(parse_codecs('vp9.2'), {
+            'vcodec': 'vp9.2',
+            'acodec': 'none',
+            'dynamic_range': 'HDR10',
+        })
+        self.assertEqual(parse_codecs('vp09.02.50.10.01.09.18.09.00'), {
+            'vcodec': 'vp09.02.50.10.01.09.18.09.00',
+            'acodec': 'none',
+            'dynamic_range': 'HDR10',
+        })
+        self.assertEqual(parse_codecs('av01.0.12M.10.0.110.09.16.09.0'), {
+            'vcodec': 'av01.0.12M.10.0.110.09.16.09.0',
+            'acodec': 'none',
+            'dynamic_range': 'HDR10',
+        })
+        self.assertEqual(parse_codecs('dvhe'), {
+            'vcodec': 'dvhe',
+            'acodec': 'none',
+            'dynamic_range': 'DV',
+        })
+        self.assertEqual(parse_codecs('fLaC'), {
+            'vcodec': 'none',
+            'acodec': 'flac',
+        })
         self.assertEqual(parse_codecs('theora, vorbis'), {
             'vcodec': 'theora',
             'acodec': 'vorbis',
@@ -1723,6 +1754,21 @@ Line 1
             'a', 'b', 'c', 'd',
             from_dict={'a': 'c', 'c': [], 'b': 'd', 'd': None}), 'c-d')
 
+    def test_partial_application(self):
+        test_fn = partial_application(lambda x, kwarg=None: '{0}, kwarg={1!r}'.format(x, kwarg))
+        self.assertTrue(
+            callable(test_fn(kwarg=10)),
+            'missing positional parameter should apply partially')
+        self.assertEqual(
+            test_fn(10, kwarg=42), '10, kwarg=42',
+            'positionally passed argument should call function')
+        self.assertEqual(
+            test_fn(x=10), '10, kwarg=None',
+            'keyword passed positional should call function')
+        self.assertEqual(
+            test_fn(kwarg=42)(10), '10, kwarg=42',
+            'call after partial application should call the function')
+
 
 if __name__ == '__main__':
     unittest.main()

youtube_dl/YoutubeDL.py

@@ -357,7 +357,7 @@ class YoutubeDL(object):
 
     _NUMERIC_FIELDS = set((
         'width', 'height', 'tbr', 'abr', 'asr', 'vbr', 'fps', 'filesize', 'filesize_approx',
-        'timestamp', 'upload_year', 'upload_month', 'upload_day',
+        'timestamp', 'upload_year', 'upload_month', 'upload_day', 'available_at',
         'duration', 'view_count', 'like_count', 'dislike_count', 'repost_count',
         'average_rating', 'comment_count', 'age_limit',
         'start_time', 'end_time',

youtube_dl/compat.py

@@ -55,7 +55,7 @@ except AttributeError:
 try:
     import collections.abc as compat_collections_abc
 except ImportError:
-    import collections as compat_collections_abc
+    compat_collections_abc = collections
 
 
 # compat_urllib_request
@@ -3452,6 +3452,8 @@ except ImportError:
     except ImportError:
         compat_map = map
 
+
+# compat_filter, compat_filter_fns
 try:
     from future_builtins import filter as compat_filter
 except ImportError:
@@ -3459,6 +3461,9 @@ except ImportError:
         from itertools import ifilter as compat_filter
     except ImportError:
         compat_filter = filter
+# "Is this function one or maybe the other filter()?"
+compat_filter_fns = tuple(set((filter, compat_filter)))
+
 
 # compat_zip
 try:
@@ -3478,6 +3483,40 @@ except ImportError:
     from itertools import izip_longest as compat_itertools_zip_longest
 
 
+# compat_abc_ABC
+try:
+    from abc import ABC as compat_abc_ABC
+except ImportError:
+    # Py < 3.4
+    from abc import ABCMeta as _ABCMeta
+    compat_abc_ABC = _ABCMeta(str('ABC'), (object,), {})
+
+
+# dict mixin used here
+# like UserDict.DictMixin, without methods created by MutableMapping
+class _DictMixin(compat_abc_ABC):
+    def has_key(self, key):
+        return key in self
+
+    # get(), clear(), setdefault() in MM
+
+    def iterkeys(self):
+        return (k for k in self)
+
+    def itervalues(self):
+        return (self[k] for k in self)
+
+    def iteritems(self):
+        return ((k, self[k]) for k in self)
+
+    # pop(), popitem() in MM
+
+    def copy(self):
+        return type(self)(self)
+
+    # update() in MM
+
+
 # compat_collections_chain_map
 # collections.ChainMap: new class
 try:
@@ -3632,6 +3671,129 @@ except ImportError:
     compat_zstandard = None
 
 
+# compat_thread
+try:
+    import _thread as compat_thread
+except ImportError:
+    try:
+        import thread as compat_thread
+    except ImportError:
+        import dummy_thread as compat_thread
+
+
+# compat_dict
+# compat_builtins_dict
+# compat_dict_items
+if sys.version_info >= (3, 6):
+    compat_dict = compat_builtins_dict = dict
+    compat_dict_items = dict.items
+else:
+    _get_ident = compat_thread.get_ident
+
+    class compat_dict(compat_collections_abc.MutableMapping, _DictMixin, dict):
+        """`dict` that preserves insertion order with interface like Py3.7+"""
+
+        _order = []  # default that should never be used
+
+        def __init__(self, *mappings_or_iterables, **kwargs):
+            # order an unordered dict using a list of keys: actual Py 2.7+
+            # OrderedDict uses a doubly linked list for better performance
+            self._order = []
+            for arg in mappings_or_iterables:
+                self.__update(arg)
+            if kwargs:
+                self.__update(kwargs)
+
+        def __getitem__(self, key):
+            return dict.__getitem__(self, key)
+
+        def __setitem__(self, key, value):
+            try:
+                if key not in self._order:
+                    self._order.append(key)
+                dict.__setitem__(self, key, value)
+            except Exception:
+                if key in self._order[-1:] and key not in self:
+                    del self._order[-1]
+                raise
+
+        def __len__(self):
+            return dict.__len__(self)
+
+        def __delitem__(self, key):
+            dict.__delitem__(self, key)
+            try:
+                # expected case, O(len(self)), but who dels anyway?
+                self._order.remove(key)
+            except ValueError:
+                pass
+
+        def __iter__(self):
+            for from_ in self._order:
+                if from_ in self:
+                    yield from_
+
+        def __del__(self):
+            for attr in ('_order',):
+                try:
+                    delattr(self, attr)
+                except Exception:
+                    pass
+
+        def __repr__(self, _repr_running={}):
+            # skip recursive items ...
+            call_key = id(self), _get_ident()
+            if _repr_running.get(call_key):
+                return '...'
+            _repr_running[call_key] = True
+            try:
+                return '%s({%s})' % (
+                    type(self).__name__,
+                    ','.join('%r: %r' % k_v for k_v in self.items()))
+            finally:
+                del _repr_running[call_key]
+
+        # merge/update (PEP 584)
+
+        def __or__(self, other):
+            if not isinstance(other, compat_collections_abc.Mapping):
+                return NotImplemented
+            new = type(self)(self)
+            new.update(other)
+            return new
+
+        def __ror__(self, other):
+            if not isinstance(other, compat_collections_abc.Mapping):
+                return NotImplemented
+            new = type(other)(other)
+            new.update(self)
+            return new
+
+        def __ior__(self, other):
+            self.update(other)
+            return self
+
+        # optimisations
+
+        def __reversed__(self):
+            for from_ in reversed(self._order):
+                if from_ in self:
+                    yield from_
+
+        def __contains__(self, item):
+            return dict.__contains__(self, item)
+
+        # allow overriding update without breaking __init__
+        def __update(self, *args, **kwargs):
+            super(compat_dict, self).update(*args, **kwargs)
+
+    compat_builtins_dict = dict
+    # Using the object's method, not dict's:
+    #   an ordered dict's items can be returned unstably by unordered
+    #   dict.items as if the method was not ((k, self[k]) for k in self)
+    compat_dict_items = lambda d: d.items()
+
+
 legacy = [
     'compat_HTMLParseError',
     'compat_HTMLParser',
@@ -3662,9 +3824,11 @@ legacy = [
 
 __all__ = [
     'compat_Struct',
+    'compat_abc_ABC',
     'compat_base64_b64decode',
     'compat_basestring',
     'compat_brotli',
+    'compat_builtins_dict',
     'compat_casefold',
     'compat_chr',
     'compat_collections_abc',
@@ -3672,9 +3836,12 @@ __all__ = [
     'compat_contextlib_suppress',
     'compat_ctypes_WINFUNCTYPE',
     'compat_datetime_timedelta_total_seconds',
+    'compat_dict',
+    'compat_dict_items',
     'compat_etree_fromstring',
     'compat_etree_iterfind',
     'compat_filter',
+    'compat_filter_fns',
     'compat_get_terminal_size',
     'compat_getenv',
     'compat_getpass_getpass',
@@ -3716,6 +3883,7 @@ __all__ = [
     'compat_struct_unpack',
     'compat_subprocess_get_DEVNULL',
     'compat_subprocess_Popen',
+    'compat_thread',
     'compat_tokenize_tokenize',
     'compat_urllib_error',
     'compat_urllib_parse',

youtube_dl/extractor/common.py

@@ -214,6 +214,7 @@ class InfoExtractor(object):
                                  width : height ratio as float.
                     * no_resume  The server does not support resuming the
                                  (HTTP or RTMP) download. Boolean.
+                    * available_at  Unix timestamp of when a format will be available to download
                     * downloader_options  A dictionary of downloader options as
                                  described in FileDownloader
 

youtube_dl/extractor/youtube.py

@@ -17,6 +17,8 @@ from ..compat import (
     compat_chr,
     compat_HTTPError,
     compat_map as map,
+    compat_dict as o_dict,
+    compat_dict_items as dict_items,
     compat_str,
     compat_urllib_parse,
     compat_urllib_parse_parse_qs as compat_parse_qs,
@@ -86,8 +88,24 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
 
     _PLAYLIST_ID_RE = r'(?:(?:PL|LL|EC|UU|FL|RD|UL|TL|PU|OLAK5uy_)[0-9A-Za-z-_]{10,}|RDMM)'
 
-    _INNERTUBE_CLIENTS = {
+    # priority order for now
-        'ios': {
+    _INNERTUBE_CLIENTS = o_dict((
+        # Doesn't require a PoToken for some reason: thx yt-dlp/yt-dlp#14693
+        ('android_sdkless', {
+            'INNERTUBE_CONTEXT': {
+                'client': {
+                    'clientName': 'ANDROID',
+                    'clientVersion': '20.10.38',
+                    'userAgent': 'com.google.android.youtube/20.10.38 (Linux; U; Android 11) gzip',
+                    'osName': 'Android',
+                    'osVersion': '11',
+                },
+            },
+            'INNERTUBE_CONTEXT_CLIENT_NAME': 3,
+            'REQUIRE_JS_PLAYER': False,
+            'WITH_COOKIES': False,
+        }),
+        ('ios', {
             'INNERTUBE_CONTEXT': {
                 'client': {
                     'clientName': 'IOS',
@@ -100,12 +118,13 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
                 },
             },
             'INNERTUBE_CONTEXT_CLIENT_NAME': 5,
-            'REQUIRE_PO_TOKEN': False,
+            'REQUIRE_PO_TOKEN': True,
             'REQUIRE_JS_PLAYER': False,
-        },
+            'WITH_COOKIES': False,
+        }),
         # mweb has 'ultralow' formats
         # See: https://github.com/yt-dlp/yt-dlp/pull/557
-        'mweb': {
+        ('mweb', {
             'INNERTUBE_CONTEXT': {
                 'client': {
                     'clientName': 'MWEB',
@@ -116,9 +135,19 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
             },
             'INNERTUBE_CONTEXT_CLIENT_NAME': 2,
             'REQUIRE_PO_TOKEN': True,
+        }),
+        ('tv_downgraded', {
+            'INNERTUBE_CONTEXT': {
+                'client': {
+                    'clientName': 'TVHTML5',
+                    'clientVersion': '4',  # avoids SABR formats, thx yt-dlp/yt-dlp#14887
+                    'userAgent': 'Mozilla/5.0 (ChromiumStylePlatform) Cobalt/Version',
+                },
+            },
+            'INNERTUBE_CONTEXT_CLIENT_NAME': 7,
             'SUPPORTS_COOKIES': True,
-        },
+        }),
-        'tv': {
+        ('tv', {
             'INNERTUBE_CONTEXT': {
                 'client': {
                     'clientName': 'TVHTML5',
@@ -128,10 +157,8 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
                 },
             },
             'INNERTUBE_CONTEXT_CLIENT_NAME': 7,
-            'SUPPORTS_COOKIES': True,
+        }),
-        },
+        ('web', {
-
-        'web': {
             'INNERTUBE_CONTEXT': {
                 'client': {
                     'clientName': 'WEB',
@@ -141,10 +168,20 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
             },
             'INNERTUBE_CONTEXT_CLIENT_NAME': 1,
             'REQUIRE_PO_TOKEN': True,
+        }),
+        ('web_embedded', {
+            'INNERTUBE_CONTEXT': {
+                'client': {
+                    'clientName': 'WEB_EMBEDDED_PLAYER',
+                    'clientVersion': '1.20250923.21.00',
+                    'embedUrl': 'https://www.youtube.com/',  # Can be any valid URL
+                },
+            },
+            'INNERTUBE_CONTEXT_CLIENT_NAME': 56,
             'SUPPORTS_COOKIES': True,
-        },
+        }),
         # Safari UA returns pre-merged video+audio 144p/240p/360p/720p/1080p HLS formats
-        'web_safari': {
+        ('web_safari', {
             'INNERTUBE_CONTEXT': {
                 'client': {
                     'clientName': 'WEB',
@@ -152,8 +189,24 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
                     'userAgent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Safari/605.1.15,gzip(gfe)',
                 },
             },
-        },
+            'INNERTUBE_CONTEXT_CLIENT_NAME': 1,
-    }
+            'SUPPORTS_COOKIES': True,
+            'REQUIRE_PO': True,
+        }),
+        # This client now requires sign-in for every video
+        ('web_creator', {
+            'INNERTUBE_CONTEXT': {
+                'client': {
+                    'clientName': 'WEB_CREATOR',
+                    'clientVersion': '1.20250922.03.00',
+                },
+            },
+            'INNERTUBE_CONTEXT_CLIENT_NAME': 62,
+            'REQUIRE_AUTH': True,
+            'SUPPORTS_COOKIES': True,
+            'WITH_COOKIES': True,
+        }),
+    ))
 
     def _login(self):
         """
@@ -430,6 +483,12 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
                     ('responseContext', 'visitorData')),
                    T(compat_str)))
 
+    #  @functools.cached_property
+    def is_authenticated(self, _cache={}):
+        if self not in _cache:
+            _cache[self] = bool(self._generate_sapisidhash_header())
+        return _cache[self]
+
     def _extract_ytcfg(self, video_id, webpage):
         ytcfg = self._search_json(
             r'ytcfg\.set\s*\(', webpage, 'ytcfg', video_id,
@@ -474,6 +533,27 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
             'uploader': uploader,
         }
 
+    @staticmethod
+    def _get_text(data, *path_list, **kw_max_runs):
+        max_runs = kw_max_runs.get('max_runs')
+
+        for path in path_list or [None]:
+            if path is None:
+                obj = [data]  # shortcut
+            else:
+                obj = traverse_obj(data, tuple(variadic(path) + (all,)))
+            for runs in traverse_obj(
+                    obj, ('simpleText', {'text': T(compat_str)}, all, filter),
+                    ('runs', lambda _, r: isinstance(r.get('text'), compat_str), all, filter),
+                    (T(list), lambda _, r: isinstance(r.get('text'), compat_str)),
+                    default=[]):
+                max_runs = int_or_none(max_runs, default=len(runs))
+                if max_runs < len(runs):
+                    runs = runs[:max_runs]
+                text = ''.join(traverse_obj(runs, (Ellipsis, 'text')))
+                if text:
+                    return text
+
     @staticmethod
     def _extract_thumbnails(data, *path_list, **kw_final_key):
         """
@@ -1619,16 +1699,17 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         self._player_cache = {}
 
     def _get_player_js_version(self):
-        player_js_version = self.get_param('youtube_player_js_version') or '20348@0004de42'
+        player_js_version = self.get_param('youtube_player_js_version')
-        sts_hash = self._search_regex(
+        if player_js_version:
-            ('^actual$(^)?(^)?', r'^([0-9]{5,})@([0-9a-f]{8,})$'),
+            sts_hash = self._search_regex(
-            player_js_version, 'player_js_version', group=(1, 2), default=None)
+                ('^actual$(^)?(^)?', r'^([0-9]{5,})@([0-9a-f]{8,})$'),
-        if sts_hash:
+                player_js_version, 'player_js_version', group=(1, 2), default=None)
-            return sts_hash
+            if sts_hash:
-        self.report_warning(
+                return sts_hash
-            'Invalid player JS version "{0}" specified. '
+            self.report_warning(
-            'It should be "{1}" or in the format of {2}'.format(
+                'Invalid player JS version "{0}" specified. '
-                player_js_version, 'actual', 'SignatureTimeStamp@Hash'), only_once=True)
+                'It should be "{1}" or in the format of {2}'.format(
+                    player_js_version, 'actual', 'SignatureTimeStamp@Hash'), only_once=True)
         return None, None
 
     # *ytcfgs, webpage=None
@@ -1643,18 +1724,18 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 ytcfgs = ytcfgs + ({'PLAYER_JS_URL': player_url},)
         player_url = traverse_obj(
             ytcfgs, (Ellipsis, 'PLAYER_JS_URL'), (Ellipsis, 'WEB_PLAYER_CONTEXT_CONFIGS', Ellipsis, 'jsUrl'),
-            get_all=False, expected_type=lambda u: urljoin('https://www.youtube.com', u))
+            get_all=False, expected_type=self._yt_urljoin)
 
-        player_id_override = self._get_player_js_version()[1]
+        requested_js_variant = self.get_param('youtube_player_js_variant')
-
-        requested_js_variant = self.get_param('youtube_player_js_variant') or 'main'
         variant_js = next(
             (v for k, v in self._PLAYER_JS_VARIANT_MAP if k == requested_js_variant),
             None)
         if variant_js:
+            player_id_override = self._get_player_js_version()[1]
             player_id = player_id_override or self._extract_player_info(player_url)
             original_url = player_url
-            player_url = '/s/player/{0}/{1}'.format(player_id, variant_js)
+            player_url = self._yt_urljoin(
+                '/s/player/{0}/{1}'.format(player_id, variant_js))
             if original_url != player_url:
                 self.write_debug(
                     'Forcing "{0}" player JS variant for player {1}\n'
@@ -1668,7 +1749,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                     requested_js_variant, ','.join(k for k, _ in self._PLAYER_JS_VARIANT_MAP)),
                 only_once=True)
 
-        return urljoin('https://www.youtube.com', player_url)
+        return player_url
 
     def _download_player_url(self, video_id, fatal=False):
         res = self._download_webpage(
@@ -2048,8 +2129,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             return self._cached(self._decrypt_nsig, 'nsig', n, player_url)
 
         for fmt in formats:
-            parsed_fmt_url = compat_urllib_parse.urlparse(fmt['url'])
+            n_param = parse_qs(fmt['url']).get('n')
-            n_param = compat_parse_qs(parsed_fmt_url.query).get('n')
             if not n_param:
                 continue
             n_param = n_param[-1]
@@ -2098,32 +2178,35 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         return sts
 
     def _mark_watched(self, video_id, player_response):
-        playback_url = url_or_none(try_get(
-            player_response,
-            lambda x: x['playbackTracking']['videostatsPlaybackUrl']['baseUrl']))
-        if not playback_url:
-            return
-
         # cpn generation algorithm is reverse engineered from base.js.
         # In fact it works even with dummy cpn.
         CPN_ALPHABET = string.ascii_letters + string.digits + '-_'
         cpn = ''.join(CPN_ALPHABET[random.randint(0, 256) & 63] for _ in range(16))
 
-        # more consistent results setting it to right before the end
+        for is_full, key in enumerate(('videostatsPlaybackUrl', 'videostatsWatchtimeUrl')):
-        qs = parse_qs(playback_url)
+            label = 'fully ' if is_full > 0 else ''
-        video_length = '{0}'.format(float((qs.get('len') or ['1.5'])[0]) - 1)
 
-        playback_url = update_url_query(
+            playback_url = traverse_obj(player_response, (
-            playback_url, {
+                'playbackTracking'. key, 'baseUrl', T(url_or_none)))
-                'ver': '2',
+            if not playback_url:
-                'cpn': cpn,
+                self.report_warning('Unable to mark {0}watched'.format(label))
-                'cmt': video_length,
+                continue
-                'el': 'detailpage',  # otherwise defaults to "shorts"
-            })
 
-        self._download_webpage(
+            # more consistent results setting it to right before the end
-            playback_url, video_id, 'Marking watched',
+            qs = parse_qs(playback_url)
-            'Unable to mark watched', fatal=False)
+            video_length = '{0}'.format(float((qs.get('len') or ['1.5'])[0]) - 1)
+
+            playback_url = update_url_query(
+                playback_url, {
+                    'ver': '2',
+                    'cpn': cpn,
+                    'cmt': video_length,
+                    'el': 'detailpage',  # otherwise defaults to "shorts"
+                })
+
+            self._download_webpage(
+                playback_url, video_id, 'Marking {0}watched'.format(label),
+                'Unable to mark watched', fatal=False)
 
     @staticmethod
     def _extract_urls(webpage):
@@ -2215,6 +2298,49 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             (r'%s\s*%s' % (regex, self._YT_INITIAL_BOUNDARY_RE),
              regex), webpage, name, default='{}'), video_id, fatal=False)
 
+    def _get_preroll_length(self, ad_slot_lists):
+
+        def parse_instream_ad_renderer(instream_renderer):
+            for skippable, path in (
+                    ('', ('skipOffsetMilliseconds', T(int))),
+                    ('non-', ('playerVars', T(compat_parse_qs),
+                     'length_seconds', -1, T(int_or_none(invscale=1000))))):
+                length_ms = traverse_obj(instream_renderer, path)
+                if length_ms is not None:
+                    self.write_debug('Detected a %ds %sskippable ad' % (
+                        length_ms // 1000, skippable))
+                    break
+            return length_ms
+
+        for slot_renderer in traverse_obj(ad_slot_lists, ('adSlots', Ellipsis, 'adSlotRenderer', T(dict))):
+            if traverse_obj(slot_renderer, ('adSlotMetadata', 'triggerEvent')) != 'SLOT_TRIGGER_EVENT_BEFORE_CONTENT':
+                continue
+            rendering_content = traverse_obj(slot_renderer, (
+                'fulfillmentContent', 'fulfilledLayout', 'playerBytesAdLayoutRenderer',
+                'renderingContent', 'instreamVideoAdRenderer', T(dict)))
+            length_ms = parse_instream_ad_renderer(rendering_content)
+            if length_ms is not None:
+                return length_ms
+            times = traverse_obj(rendering_content, ((
+                ('playerBytesSequentialLayoutRenderer', 'sequentialLayouts'),
+                None), any, Ellipsis, 'playerBytesAdLayoutRenderer',
+                'renderingContent', 'instreamVideoAdRenderer',
+                T(parse_instream_ad_renderer)))
+            if times:
+                return sum(times)
+        return 0
+
+    def _is_premium_subscriber(self, initial_data):
+        if not self.is_authenticated or not initial_data:
+            return False
+
+        tlr = traverse_obj(
+            initial_data, ('topbar', 'desktopTopbarRenderer', 'logo', 'topbarLogoRenderer'))
+        return (
+            traverse_obj(tlr, ('iconImage', 'iconType')) == 'YOUTUBE_PREMIUM_LOGO'
+            or 'premium' in (self._get_text(tlr, 'tooltipText') or '').lower()
+        )
+
     def _real_extract(self, url):
         url, smuggled_data = unsmuggle_url(url, {})
         video_id = self._match_id(url)
@@ -2242,32 +2368,36 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         if True or not player_response:
             origin = 'https://www.youtube.com'
             pb_context = {'html5Preference': 'HTML5_PREF_WANTS'}
-            fetched_timestamp = int(time.time())
-
             player_url = self._extract_player_url(webpage)
             ytcfg = self._extract_ytcfg(video_id, webpage or '')
             sts = self._extract_signature_timestamp(video_id, player_url, ytcfg)
             if sts:
                 pb_context['signatureTimestamp'] = sts
 
-            client_names = traverse_obj(self._INNERTUBE_CLIENTS, (
+            auth = self._generate_sapisidhash_header(origin)
-                T(dict.items), lambda _, k_v: not k_v[1].get('REQUIRE_PO_TOKEN'),
+
-                0))[:1]
+            client_names = []
+            if auth or self._is_premium_subscriber(player_response):
+                client_names = traverse_obj(self._INNERTUBE_CLIENTS, (
+                    T(dict_items), lambda _, k_v: k_v[0] == 'web_safari', 0))[:1]
+            if not client_names:
+                client_names = traverse_obj(self._INNERTUBE_CLIENTS, (
+                    T(dict_items), lambda _, k_v: not (
+                        k_v[1].get('REQUIRE_PO_TOKEN')
+                        or (bool(k_v[1].get('WITH_COOKIES', auth)) ^ bool(auth))
+                    ), 0))[:1]
             if 'web' not in client_names:
-                # webpage links won't download: ignore links and playability
+                # only live HLS webpage links will download: ignore playability
                 player_response = filter_dict(
                     player_response or {},
-                    lambda k, _: k not in ('streamingData', 'playabilityStatus'))
+                    lambda k, _: k != 'playabilityStatus')
-
-            if is_live and 'ios' not in client_names:
-                client_names.append('ios')
 
             headers = {
                 'Sec-Fetch-Mode': 'navigate',
                 'Origin': origin,
                 'X-Goog-Visitor-Id': self._extract_visitor_data(ytcfg) or '',
             }
-            auth = self._generate_sapisidhash_header(origin)
+
             if auth is not None:
                 headers['Authorization'] = auth
                 headers['X-Origin'] = origin
@@ -2297,7 +2427,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                         'INNERTUBE_CONTEXT', 'client', 'clientVersion'),
                     'User-Agent': (
                         'INNERTUBE_CONTEXT', 'client', 'userAgent'),
-                }))
+                }) or {})
 
                 api_player_response = self._call_api(
                     'player', query, video_id, fatal=False, headers=api_headers,
@@ -2306,19 +2436,22 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                             'context', 'client', 'clientName')),
                         'API JSON', delim=' '))
 
-                hls = traverse_obj(
+                # be sure to find HLS in case of is_live
-                    (player_response, api_player_response),
+                hls = traverse_obj(player_response, (
-                    (Ellipsis, 'streamingData', 'hlsManifestUrl', T(url_or_none)))
+                    'streamingData', 'hlsManifestUrl', T(url_or_none)))
                 fetched_timestamp = int(time.time())
-                if len(hls) == 2 and not hls[0] and hls[1]:
+                preroll_length_ms = (
-                    player_response['streamingData']['hlsManifestUrl'] = hls[1]
+                    self._get_preroll_length(api_player_response)
-                else:
+                    or self._get_preroll_length(player_response))
-                    video_details = merge_dicts(*traverse_obj(
+                video_details = merge_dicts(*traverse_obj(
-                        (player_response, api_player_response),
+                    (player_response, api_player_response),
-                        (Ellipsis, 'videoDetails', T(dict))))
+                    (Ellipsis, 'videoDetails', T(dict))))
-                    player_response.update(filter_dict(
+                player_response.update(filter_dict(
-                        api_player_response or {}, cndn=lambda k, _: k != 'captions'))
+                    api_player_response or {}, cndn=lambda k, _: k != 'captions'))
-                    player_response['videoDetails'] = video_details
+                player_response['videoDetails'] = video_details
+                if hls and not traverse_obj(player_response, (
+                        'streamingData', 'hlsManifestUrl', T(url_or_none))):
+                    player_response['streamingData']['hlsManifestUrl'] = hls
 
         def is_agegated(playability):
             # playability: dict
@@ -2385,10 +2518,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             return self.url_result(
                 trailer_video_id, self.ie_key(), trailer_video_id)
 
-        def get_text(x):
+        get_text = lambda x: self._get_text(x) or ''
-            return ''.join(traverse_obj(
-                x, (('simpleText',),), ('runs', Ellipsis, 'text'),
-                expected_type=compat_str))
 
         search_meta = (
             (lambda x: self._html_search_meta(x, webpage, default=None))
@@ -2476,7 +2606,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         elif fetched_timestamp is not None:
             # Handle preroll waiting period
             preroll_sleep = self.get_param('youtube_preroll_sleep')
-            preroll_sleep = int_or_none(preroll_sleep, default=6)
+            preroll_sleep = min(6, int_or_none(preroll_sleep, default=preroll_length_ms / 1000))
             fetched_timestamp += preroll_sleep
 
         for fmt in streaming_formats:
@@ -2522,6 +2652,10 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                     self.write_debug(error_to_compat_str(e), only_once=True)
                     continue
 
+            if parse_qs(fmt_url).get('n'):
+                # this and (we assume) all the formats here are n-scrambled
+                break
+
             language_preference = (
                 10 if audio_track.get('audioIsDefault')
                 else -10 if 'descriptive' in (traverse_obj(audio_track, ('displayName', T(lower))) or '')
@@ -2654,7 +2788,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             subreason = pemr.get('subreason')
             if subreason:
                 subreason = clean_html(get_text(subreason))
-                if subreason == 'The uploader has not made this video available in your country.':
+                if subreason.startswith('The uploader has not made this video available in your country'):
                     countries = microformat.get('availableCountries')
                     if not countries:
                         regions_allowed = search_meta('regionsAllowed')
@@ -2848,24 +2982,21 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             chapters = self._extract_chapters_from_json(
                 initial_data, video_id, duration)
             if not chapters:
-                for engagment_pannel in (initial_data.get('engagementPanels') or []):
+                def chapter_time(mmlir):
-                    contents = try_get(
+                    return parse_duration(
-                        engagment_pannel, lambda x: x['engagementPanelSectionListRenderer']['content']['macroMarkersListRenderer']['contents'],
+                        get_text(mmlir.get('timeDescription')))
-                        list)
-                    if not contents:
-                        continue
 
-                    def chapter_time(mmlir):
+                for markers in traverse_obj(initial_data, (
-                        return parse_duration(
+                        'engagementPanels', Ellipsis, 'engagementPanelSectionListRenderer',
-                            get_text(mmlir.get('timeDescription')))
+                        'content', 'macroMarkersListRenderer', 'contents', T(list))):
 
                     chapters = []
-                    for next_num, content in enumerate(contents, start=1):
+                    for next_num, content in enumerate(markers, start=1):
                         mmlir = content.get('macroMarkersListItemRenderer') or {}
                         start_time = chapter_time(mmlir)
-                        end_time = (traverse_obj(
+                        end_time = (traverse_obj(markers, (
-                            contents, (next_num, 'macroMarkersListItemRenderer', T(chapter_time)))
+                            next_num, 'macroMarkersListItemRenderer', T(chapter_time)))
-                            if next_num < len(contents) else duration)
+                            if next_num < len(markers) else duration)
                         if start_time is None or end_time is None:
                             continue
                         chapters.append({
@@ -3424,12 +3555,6 @@ class YoutubeTabIE(YoutubeBaseInfoExtractor):
             T(dict.items), lambda _, k_v: k_v[0].startswith('grid') and k_v[0].endswith('Renderer'),
             1, T(dict)), get_all=False)
 
-    @staticmethod
-    def _get_text(r, k):
-        return traverse_obj(
-            r, (k, 'runs', 0, 'text'), (k, 'simpleText'),
-            expected_type=txt_or_none)
-
     def _grid_entries(self, grid_renderer):
         for item in traverse_obj(grid_renderer, ('items', Ellipsis, T(dict))):
             lockup_view_model = traverse_obj(item, ('lockupViewModel', T(dict)))
@@ -3540,15 +3665,25 @@ class YoutubeTabIE(YoutubeBaseInfoExtractor):
                 'Unsupported lockup view model content type "{0}"{1}'.format(content_type, bug_reports_message()),
                 only_once=True)
             return
+
         thumb_keys = ('contentImage',) + thumb_keys + ('thumbnailViewModel', 'image')
+
         return merge_dicts(self.url_result(
-            url, ie=ie.ie_key(), video_id=content_id), {
+            url, ie=ie.ie_key(), video_id=content_id),
-                'title': traverse_obj(view_model, (
+            traverse_obj(view_model, {
-                    'metadata', 'lockupMetadataViewModel', 'title',
+                'title': ('metadata', 'lockupMetadataViewModel', 'title',
-                    'content', T(compat_str))),
+                          'content', T(compat_str)),
-                'thumbnails': self._extract_thumbnails(
+                'thumbnails': T(lambda vm: self._extract_thumbnails(
-                    view_model, thumb_keys, final_key='sources'),
+                    vm, thumb_keys, final_key='sources')),
-        })
+                'duration': (
+                    'contentImage', 'thumbnailViewModel', 'overlays',
+                    Ellipsis, (
+                        ('thumbnailBottomOverlayViewModel', 'badges'),
+                        ('thumbnailOverlayBadgeViewModel', 'thumbnailBadges')
+                    ), Ellipsis, 'thumbnailBadgeViewModel', 'text',
+                    T(parse_duration), any),
+            })
+        )
 
     def _extract_shorts_lockup_view_model(self, view_model):
         content_id = traverse_obj(view_model, (

youtube_dl/options.py

@@ -421,12 +421,12 @@ def parseOpts(overrideArguments=None):
         action='store', dest='youtube_player_js_variant',
         help='For YouTube, the player javascript variant to use for n/sig deciphering; `actual` to follow the site; default `%default`.',
         choices=('actual', 'main', 'tcc', 'tce', 'es5', 'es6', 'tv', 'tv_es6', 'phone', 'tablet'),
-        default='main', metavar='VARIANT')
+        default='actual', metavar='VARIANT')
     video_format.add_option(
         '--youtube-player-js-version',
         action='store', dest='youtube_player_js_version',
         help='For YouTube, the player javascript version to use for n/sig deciphering, specified as `signature_timestamp@hash`, or `actual` to follow the site; default `%default`',
-        default='20348@0004de42', metavar='STS@HASH')
+        default='actual', metavar='STS@HASH')
     video_format.add_option(
         '--merge-output-format',
         action='store', dest='merge_output_format', metavar='FORMAT', default=None,

youtube_dl/traversal.py

@@ -5,6 +5,10 @@
 from .utils import (
     dict_get,
     get_first,
+    require,
+    subs_list_to_dict,
     T,
     traverse_obj,
+    unpack,
+    value,
 )

youtube_dl/utils.py

@@ -53,6 +53,8 @@ from .compat import (
     compat_etree_fromstring,
     compat_etree_iterfind,
     compat_expanduser,
+    compat_filter as filter,
+    compat_filter_fns,
     compat_html_entities,
     compat_html_entities_html5,
     compat_http_client,
@@ -1859,6 +1861,39 @@ def write_json_file(obj, fn):
         raise
 
 
+class partial_application(object):
+    """Allow a function to use pre-set argument values"""
+
+    # see _try_bind_args()
+    try:
+        inspect.signature
+
+        @staticmethod
+        def required_args(fn):
+            return [
+                param.name for param in inspect.signature(fn).parameters.values()
+                if (param.kind in (inspect.Parameter.POSITIONAL_ONLY, inspect.Parameter.POSITIONAL_OR_KEYWORD)
+                    and param.default is inspect.Parameter.empty)]
+
+    except AttributeError:
+
+        # Py < 3.3
+        @staticmethod
+        def required_args(fn):
+            fn_args = inspect.getargspec(fn)
+            n_defaults = len(fn_args.defaults or [])
+            return (fn_args.args or [])[:-n_defaults if n_defaults > 0 else None]
+
+    def __new__(cls, func):
+        @functools.wraps(func)
+        def wrapped(*args, **kwargs):
+            if set(cls.required_args(func)[len(args):]).difference(kwargs):
+                return functools.partial(func, *args, **kwargs)
+            return func(*args, **kwargs)
+
+        return wrapped
+
+
 if sys.version_info >= (2, 7):
     def find_xpath_attr(node, xpath, key, val=None):
         """ Find the xpath xpath[@key=val] """
@@ -3152,6 +3187,7 @@ def extract_timezone(date_str):
     return timezone, date_str
 
 
+@partial_application
 def parse_iso8601(date_str, delimiter='T', timezone=None):
     """ Return a UNIX timestamp from the given date """
 
@@ -3229,6 +3265,7 @@ def unified_timestamp(date_str, day_first=True):
         return calendar.timegm(timetuple) + pm_delta * 3600 - compat_datetime_timedelta_total_seconds(timezone)
 
 
+@partial_application
 def determine_ext(url, default_ext='unknown_video'):
     if url is None or '.' not in url:
         return default_ext
@@ -3807,6 +3844,7 @@ def base_url(url):
     return re.match(r'https?://[^?#&]+/', url).group()
 
 
+@partial_application
 def urljoin(base, path):
     path = _decode_compat_str(path, encoding='utf-8', or_none=True)
     if not path:
@@ -3831,6 +3869,7 @@ class PUTRequest(compat_urllib_request.Request):
         return 'PUT'
 
 
+@partial_application
 def int_or_none(v, scale=1, default=None, get_attr=None, invscale=1, base=None):
     if get_attr:
         if v is not None:
@@ -3857,6 +3896,7 @@ def str_to_int(int_str):
         return int_or_none(int_str)
 
 
+@partial_application
 def float_or_none(v, scale=1, invscale=1, default=None):
     if v is None:
         return default
@@ -3891,38 +3931,46 @@ def parse_duration(s):
         return None
 
     s = s.strip()
+    if not s:
+        return None
 
     days, hours, mins, secs, ms = [None] * 5
-    m = re.match(r'(?:(?:(?:(?P<days>[0-9]+):)?(?P<hours>[0-9]+):)?(?P<mins>[0-9]+):)?(?P<secs>[0-9]+)(?P<ms>\.[0-9]+)?Z?$', s)
+    m = re.match(r'''(?x)
+            (?P<before_secs>
+                (?:(?:(?P<days>[0-9]+):)?(?P<hours>[0-9]+):)?
+                (?P<mins>[0-9]+):)?
+                (?P<secs>(?(before_secs)[0-9]{1,2}|[0-9]+))
+            (?:[.:](?P<ms>[0-9]+))?Z?$
+        ''', s)
     if m:
-        days, hours, mins, secs, ms = m.groups()
+        days, hours, mins, secs, ms = m.group('days', 'hours', 'mins', 'secs', 'ms')
     else:
         m = re.match(
             r'''(?ix)(?:P?
                 (?:
-                    [0-9]+\s*y(?:ears?)?\s*
+                    [0-9]+\s*y(?:ears?)?,?\s*
                 )?
                 (?:
-                    [0-9]+\s*m(?:onths?)?\s*
+                    [0-9]+\s*m(?:onths?)?,?\s*
                 )?
                 (?:
-                    [0-9]+\s*w(?:eeks?)?\s*
+                    [0-9]+\s*w(?:eeks?)?,?\s*
                 )?
                 (?:
-                    (?P<days>[0-9]+)\s*d(?:ays?)?\s*
+                    (?P<days>[0-9]+)\s*d(?:ays?)?,?\s*
                 )?
                 T)?
                 (?:
-                    (?P<hours>[0-9]+)\s*h(?:ours?)?\s*
+                    (?P<hours>[0-9]+)\s*h(?:(?:ou)?rs?)?,?\s*
                 )?
                 (?:
-                    (?P<mins>[0-9]+)\s*m(?:in(?:ute)?s?)?\s*
+                    (?P<mins>[0-9]+)\s*m(?:in(?:ute)?s?)?,?\s*
                 )?
                 (?:
-                    (?P<secs>[0-9]+)(?P<ms>\.[0-9]+)?\s*s(?:ec(?:ond)?s?)?\s*
+                    (?P<secs>[0-9]+)(?:\.(?P<ms>[0-9]+))?\s*s(?:ec(?:ond)?s?)?\s*
                 )?Z?$''', s)
         if m:
-            days, hours, mins, secs, ms = m.groups()
+            days, hours, mins, secs, ms = m.group('days', 'hours', 'mins', 'secs', 'ms')
         else:
             m = re.match(r'(?i)(?:(?P<hours>[0-9.]+)\s*(?:hours?)|(?P<mins>[0-9.]+)\s*(?:mins?\.?|minutes?)\s*)Z?$', s)
             if m:
@@ -3930,17 +3978,13 @@ def parse_duration(s):
             else:
                 return None
 
-    duration = 0
+    duration = (
-    if secs:
+        ((((float(days) * 24) if days else 0)
-        duration += float(secs)
+          + (float(hours) if hours else 0)) * 60
-    if mins:
+         + (float(mins) if mins else 0)) * 60
-        duration += float(mins) * 60
+        + (float(secs) if secs else 0)
-    if hours:
+        + (float(ms) / 10 ** len(ms) if ms else 0))
-        duration += float(hours) * 60 * 60
+
-    if days:
-        duration += float(days) * 24 * 60 * 60
-    if ms:
-        duration += float(ms)
     return duration
 
 
@@ -4251,6 +4295,7 @@ def urlencode_postdata(*args, **kargs):
     return compat_urllib_parse_urlencode(*args, **kargs).encode('ascii')
 
 
+@partial_application
 def update_url(url, **kwargs):
     """Replace URL components specified by kwargs
        url: compat_str or parsed URL tuple
@@ -4272,6 +4317,7 @@ def update_url(url, **kwargs):
     return compat_urllib_parse.urlunparse(url._replace(**kwargs))
 
 
+@partial_application
 def update_url_query(url, query):
     return update_url(url, query_update=query)
 
@@ -4698,30 +4744,45 @@ def parse_codecs(codecs_str):
     if not codecs_str:
         return {}
     split_codecs = list(filter(None, map(
-        lambda str: str.strip(), codecs_str.strip().strip(',').split(','))))
+        lambda s: s.strip(), codecs_str.strip().split(','))))
-    vcodec, acodec = None, None
+    vcodec, acodec, hdr = None, None, None
     for full_codec in split_codecs:
-        codec = full_codec.split('.')[0]
+        codec, rest = full_codec.partition('.')[::2]
-        if codec in ('avc1', 'avc2', 'avc3', 'avc4', 'vp9', 'vp8', 'hev1', 'hev2', 'h263', 'h264', 'mp4v', 'hvc1', 'av01', 'theora'):
+        codec = codec.lower()
-            if not vcodec:
+        full_codec = '.'.join((codec, rest)) if rest else codec
-                vcodec = full_codec
+        codec = re.sub(r'0+(?=\d)', '', codec)
-        elif codec in ('mp4a', 'opus', 'vorbis', 'mp3', 'aac', 'ac-3', 'ec-3', 'eac3', 'dtsc', 'dtse', 'dtsh', 'dtsl'):
+        if codec in ('avc1', 'avc2', 'avc3', 'avc4', 'vp9', 'vp8', 'hev1', 'hev2',
+                     'h263', 'h264', 'mp4v', 'hvc1', 'av1', 'theora', 'dvh1', 'dvhe'):
+            if vcodec:
+                continue
+            vcodec = full_codec
+            if codec in ('dvh1', 'dvhe'):
+                hdr = 'DV'
+            elif codec in ('av1', 'vp9'):
+                n, m = {
+                    'av1': (2, '10'),
+                    'vp9': (0, '2'),
+                }[codec]
+                if (rest.split('.', n + 1)[n:] or [''])[0].lstrip('0') == m:
+                    hdr = 'HDR10'
+        elif codec in ('flac', 'mp4a', 'opus', 'vorbis', 'mp3', 'aac', 'ac-4',
+                       'ac-3', 'ec-3', 'eac3', 'dtsc', 'dtse', 'dtsh', 'dtsl'):
             if not acodec:
                 acodec = full_codec
         else:
-            write_string('WARNING: Unknown codec %s\n' % full_codec, sys.stderr)
+            write_string('WARNING: Unknown codec %s\n' % (full_codec,), sys.stderr)
-    if not vcodec and not acodec:
+
-        if len(split_codecs) == 2:
+    return (
-            return {
+        filter_dict({
-                'vcodec': split_codecs[0],
-                'acodec': split_codecs[1],
-            }
-    else:
-        return {
             'vcodec': vcodec or 'none',
             'acodec': acodec or 'none',
-        }
+            'dynamic_range': hdr,
-    return {}
+        }) if vcodec or acodec
+        else {
+            'vcodec': split_codecs[0],
+            'acodec': split_codecs[1],
+        } if len(split_codecs) == 2
+        else {})
 
 
 def urlhandle_detect_ext(url_handle):
@@ -6283,6 +6344,7 @@ def traverse_obj(obj, *paths, **kwargs):
                             Read as: `{key: traverse_obj(obj, path) for key, path in dct.items()}`.
         - `any`-builtin:    Take the first matching object and return it, resetting branching.
         - `all`-builtin:    Take all matching objects and return them as a list, resetting branching.
+        - `filter`-builtin: Return the value if it is truthy, `None` otherwise.
 
         `tuple`, `list`, and `dict` all support nested paths and branches.
 
@@ -6324,6 +6386,11 @@ def traverse_obj(obj, *paths, **kwargs):
     # instant compat
     str = compat_str
 
+    from .compat import (
+        compat_builtins_dict as dict_,  # the basic dict type
+        compat_dict as dict,            # dict preserving imsertion order
+    )
+
     casefold = lambda k: compat_casefold(k) if isinstance(k, str) else k
 
     if isinstance(expected_type, type):
@@ -6406,7 +6473,7 @@ def traverse_obj(obj, *paths, **kwargs):
             if not branching:  # string traversal
                 result = ''.join(result)
 
-        elif isinstance(key, dict):
+        elif isinstance(key, dict_):
             iter_obj = ((k, _traverse_obj(obj, v, False, is_last)) for k, v in key.items())
             result = dict((k, v if v is not None else default) for k, v in iter_obj
                           if v is not None or default is not NO_DEFAULT) or None
@@ -6484,7 +6551,7 @@ def traverse_obj(obj, *paths, **kwargs):
         has_branched = False
 
         key = None
-        for last, key in lazy_last(variadic(path, (str, bytes, dict, set))):
+        for last, key in lazy_last(variadic(path, (str, bytes, dict_, set))):
             if not casesense and isinstance(key, str):
                 key = compat_casefold(key)
 
@@ -6497,6 +6564,11 @@ def traverse_obj(obj, *paths, **kwargs):
                     objs = (list(filtered_objs),)
                 continue
 
+            # filter might be from __builtin__, future_builtins, or itertools.ifilter
+            if key in compat_filter_fns:
+                objs = filter(None, objs)
+                continue
+
             if __debug__ and callable(key):
                 # Verify function signature
                 _try_bind_args(key, None, None)
@@ -6509,10 +6581,10 @@ def traverse_obj(obj, *paths, **kwargs):
 
             objs = from_iterable(new_objs)
 
-        if test_type and not isinstance(key, (dict, list, tuple)):
+        if test_type and not isinstance(key, (dict_, list, tuple)):
             objs = map(type_test, objs)
 
-        return objs, has_branched, isinstance(key, dict)
+        return objs, has_branched, isinstance(key, dict_)
 
     def _traverse_obj(obj, path, allow_empty, test_type):
         results, has_branched, is_dict = apply_path(obj, path, test_type)
@@ -6535,6 +6607,76 @@ def traverse_obj(obj, *paths, **kwargs):
     return None if default is NO_DEFAULT else default
 
 
+def value(value):
+    return lambda _: value
+
+
+class require(ExtractorError):
+    def __init__(self, name, expected=False):
+        super(require, self).__init__(
+            'Unable to extract {0}'.format(name), expected=expected)
+
+    def __call__(self, value):
+        if value is None:
+            raise self
+
+        return value
+
+
+@partial_application
+# typing: (subs: list[dict], /, *, lang='und', ext=None) -> dict[str, list[dict]
+def subs_list_to_dict(subs, lang='und', ext=None):
+    """
+    Convert subtitles from a traversal into a subtitle dict.
+    The path should have an `all` immediately before this function.
+
+    Arguments:
+    `lang`     The default language tag for subtitle dicts with no
+               `lang` (`und`: undefined)
+    `ext`      The default value for `ext` in the subtitle dicts
+
+    In the dict you can set the following additional items:
+    `id`       The language tag to which the subtitle dict should be added
+    `quality`  The sort order for each subtitle dict
+    """
+
+    result = collections.defaultdict(list)
+
+    for sub in subs:
+        tn_url = url_or_none(sub.pop('url', None))
+        if tn_url:
+            sub['url'] = tn_url
+        elif not sub.get('data'):
+            continue
+        sub_lang = sub.pop('id', None)
+        if not isinstance(sub_lang, compat_str):
+            if not lang:
+                continue
+            sub_lang = lang
+        sub_ext = sub.get('ext')
+        if not isinstance(sub_ext, compat_str):
+            if not ext:
+                sub.pop('ext', None)
+            else:
+                sub['ext'] = ext
+        result[sub_lang].append(sub)
+    result = dict(result)
+
+    for subs in result.values():
+        subs.sort(key=lambda x: x.pop('quality', 0) or 0)
+
+    return result
+
+
+def unpack(func, **kwargs):
+    """Make a function that applies `partial(func, **kwargs)` to its argument as *args"""
+    @functools.wraps(func)
+    def inner(items):
+        return func(*items, **kwargs)
+
+    return inner
+
+
 def T(*x):
     """ For use in yt-dl instead of {type, ...} or set((type, ...)) """
     return set(x)