Merge c7684156c25cb3ce852a10cc50628d8fd54237f2 into 2b4fbfce25902d557b86b003cf48f738129efce4

thx seproDev, bashonly: yt-dlp/yt-dlp#12748

test/test_youtube_signature.py

@@ -84,6 +84,21 @@ _SIG_TESTS = [
         '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
         '0QJ8wRAIgXmPlOPSBkkUs1bYFYlJCfe29xxAj7v1pDL0QwbdV96sCIEzpWqMGkFR20CFOg51Tp-7vj_EMu-m37KtXJ2OySqa0q',
     ),
+    (
+        'https://www.youtube.com/s/player/643afba4/tv-player-ias.vflset/tv-player-ias.js',
+        '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+        'AAOAOq0QJ8wRAIgXmPlOPSBkkUs1bYFYlJCfe29xx8j7vgpDL0QwbdV06sCIEzpWqMGkFR20CFOS21Tp-7vj_EMu-m37KtXJoOy1',
+    ),
+    (
+        'https://www.youtube.com/s/player/363db69b/player_ias.vflset/en_US/base.js',
+        '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+        '0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpz2ICs6EVdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+    ),
+    (
+        'https://www.youtube.com/s/player/4fcd6e4a/player_ias.vflset/en_US/base.js',
+        '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+        'wAOAOq0QJ8ARAIgXmPlOPSBkkUs1bYFYlJCfe29xx8q7v1pDL0QwbdV96sCIEzpWqMGkFR20CFOg51Tp-7vj_EMu-m37KtXJoOySqa0',
+    ),
 ]
 
 _NSIG_TESTS = [
@@ -153,7 +168,7 @@ _NSIG_TESTS = [
     ),
     (
         'https://www.youtube.com/s/player/c57c113c/player_ias.vflset/en_US/base.js',
-        '-Txvy6bT5R6LqgnQNx', 'dcklJCnRUHbgSg',
+        'M92UUMHa8PdvPd3wyM', '3hPqLJsiNZx7yA',
     ),
     (
         'https://www.youtube.com/s/player/5a3b6271/player_ias.vflset/en_US/base.js',
@@ -173,7 +188,7 @@ _NSIG_TESTS = [
     ),
     (
         'https://www.youtube.com/s/player/cfa9e7cb/player_ias.vflset/en_US/base.js',
-        'qO0NiMtYQ7TeJnfFG2', 'k9cuJDHNS5O7kQ',
+        'aCi3iElgd2kq0bxVbQ', 'QX1y8jGb2IbZ0w',
     ),
     (
         'https://www.youtube.com/s/player/8c7583ff/player_ias.vflset/en_US/base.js',
@@ -231,10 +246,6 @@ _NSIG_TESTS = [
         'https://www.youtube.com/s/player/f6e09c70/player_ias_tce.vflset/en_US/base.js',
         'W9HJZKktxuYoDTqW', 'jHbbkcaxm54',
     ),
-    (
-        'https://www.youtube.com/s/player/643afba4/player_ias.vflset/en_US/base.js',
-        'W9HJZKktxuYoDTqW', 'larxUlagTRAcSw',
-    ),
     (
         'https://www.youtube.com/s/player/e7567ecf/player_ias_tce.vflset/en_US/base.js',
         'Sy4aDGc0VpYRR9ew_', '5UPOT1VhoZxNLQ',
@@ -259,6 +270,22 @@ _NSIG_TESTS = [
         'https://www.youtube.com/s/player/643afba4/tv-player-ias.vflset/tv-player-ias.js',
         'ir9-V6cdbCiyKxhr', '2PL7ZDYAALMfmA',
     ),
+    (
+        'https://www.youtube.com/s/player/643afba4/player_ias.vflset/en_US/base.js',
+        'W9HJZKktxuYoDTqW', 'larxUlagTRAcSw',
+    ),
+    (
+        'https://www.youtube.com/s/player/363db69b/player_ias.vflset/en_US/base.js',
+        'eWYu5d5YeY_4LyEDc', 'XJQqf-N7Xra3gg',
+    ),
+    (
+        'https://www.youtube.com/s/player/4fcd6e4a/player_ias.vflset/en_US/base.js',
+        'o_L251jm8yhZkWtBW', 'lXoxI3XvToqn6A',
+    ),
+    (
+        'https://www.youtube.com/s/player/4fcd6e4a/tv-player-ias.vflset/tv-player-ias.js',
+        'o_L251jm8yhZkWtBW', 'lXoxI3XvToqn6A',
+    ),
 ]
 
 
@@ -271,6 +298,8 @@ class TestPlayerInfo(unittest.TestCase):
             ('https://www.youtube.com/s/player/64dddad9/player-plasma-ias-phone-en_US.vflset/base.js', '64dddad9'),
             ('https://www.youtube.com/s/player/64dddad9/player-plasma-ias-phone-de_DE.vflset/base.js', '64dddad9'),
             ('https://www.youtube.com/s/player/64dddad9/player-plasma-ias-tablet-en_US.vflset/base.js', '64dddad9'),
+            ('https://www.youtube.com/s/player/e7567ecf/player_ias_tce.vflset/en_US/base.js', 'e7567ecf'),
+            ('https://www.youtube.com/s/player/643afba4/tv-player-ias.vflset/tv-player-ias.js', '643afba4'),
             # obsolete
             ('https://www.youtube.com/yts/jsbin/player_ias-vfle4-e03/en_US/base.js', 'vfle4-e03'),
             ('https://www.youtube.com/yts/jsbin/player_ias-vfl49f_g4/en_US/base.js', 'vfl49f_g4'),
@@ -280,8 +309,9 @@ class TestPlayerInfo(unittest.TestCase):
             ('https://s.ytimg.com/yts/jsbin/html5player-en_US-vflXGBaUN.js', 'vflXGBaUN'),
             ('https://s.ytimg.com/yts/jsbin/html5player-en_US-vflKjOTVq/html5player.js', 'vflKjOTVq'),
         )
+        ie = YoutubeIE(FakeYDL({'cachedir': False}))
         for player_url, expected_player_id in PLAYER_URLS:
-            player_id = YoutubeIE._extract_player_info(player_url)
+            player_id = ie._extract_player_info(player_url)
             self.assertEqual(player_id, expected_player_id)
 
 
@@ -301,8 +331,8 @@ class TestSignature(unittest.TestCase):
 def t_factory(name, sig_func, url_pattern):
     def make_tfunc(url, sig_input, expected_sig):
         m = url_pattern.match(url)
-        assert m, '%r should follow URL format' % url
+        assert m, '{0!r} should follow URL format'.format(url)
-        test_id = m.group('id')
+        test_id = re.sub(r'[/.-]', '_', m.group('id') or m.group('compat_id'))
 
         def test_func(self):
             basename = 'player-{0}-{1}.js'.format(name, test_id)
@@ -335,12 +365,16 @@ def n_sig(jscode, sig_input):
 
 
 make_sig_test = t_factory(
-    'signature', signature, re.compile(r'.*(?:-|/player/)(?P<id>[a-zA-Z0-9_-]+)(?:/.+\.js|(?:/watch_as3|/html5player)?\.[a-z]+)$'))
+    'signature', signature,
+    re.compile(r'''(?x)
+        .+/(?P<h5>html5)?player(?(h5)(?:-en_US)?-|/)(?P<id>[a-zA-Z0-9/._-]+)
+        (?(h5)/(?:watch_as3|html5player))?\.js$
+    '''))
 for test_spec in _SIG_TESTS:
     make_sig_test(*test_spec)
 
 make_nsig_test = t_factory(
-    'nsig', n_sig, re.compile(r'.+/player/(?P<id>[a-zA-Z0-9_-]+)/.+.js$'))
+    'nsig', n_sig, re.compile(r'.+/player/(?P<id>[a-zA-Z0-9_/.-]+)\.js$'))
 for test_spec in _NSIG_TESTS:
     make_nsig_test(*test_spec)
 

youtube_dl/extractor/extractors.py

@@ -1475,7 +1475,11 @@ from .videomore import (
     VideomoreSeasonIE,
 )
 from .videopress import VideoPressIE
-from .vidio import VidioIE
+from .vidio import (
+    VidioIE,
+    VidioPremierIE,
+    VidioLiveIE,
+)
 from .vidlii import VidLiiIE
 from .vidme import (
     VidmeIE,

youtube_dl/extractor/vidio.py

@@ -5,15 +5,65 @@ import re
 
 from .common import InfoExtractor
 from ..utils import (
+    ExtractorError,
+    get_element_by_class,
     int_or_none,
     parse_iso8601,
     str_or_none,
     strip_or_none,
     try_get,
+    urlencode_postdata,
 )
 
 
-class VidioIE(InfoExtractor):
+class VidioBaseIE(InfoExtractor):
+    _LOGIN_URL = 'https://www.vidio.com/users/login'
+    _NETRC_MACHINE = 'vidio'
+
+    def _login(self):
+        username, password = self._get_login_info()
+        if username is None:
+            return
+
+        def is_logged_in():
+            res = self._download_json(
+                'https://www.vidio.com/interactions.json', None, 'Checking if logged in', fatal=False) or {}
+            return bool(res.get('current_user'))
+
+        if is_logged_in():
+            return
+
+        login_page = self._download_webpage(
+            self._LOGIN_URL, None, 'Downloading log in page')
+
+        login_form = self._form_hidden_inputs("login-form", login_page)
+        login_form.update({
+            'user[login]': username,
+            'user[password]': password,
+        })
+        login_post, login_post_urlh = self._download_webpage_handle(
+            self._LOGIN_URL, None, 'Logging in', data=urlencode_postdata(login_form), expected_status=[302, 401])
+
+        if login_post_urlh.status == 401:
+            reason = get_element_by_class('onboarding-form__general-error', login_post)
+            if reason:
+                raise ExtractorError(
+                    'Unable to log in: %s' % reason, expected=True)
+            raise ExtractorError('Unable to log in')
+
+    def _real_initialize(self):
+        self._api_key = self._download_json(
+            'https://www.vidio.com/auth', None, data=b'')['api_key']
+        self._login()
+
+    def _call_api(self, url, video_id, note=None):
+        return self._download_json(url, video_id, note=note, headers={
+            'Content-Type': 'application/vnd.api+json',
+            'X-API-KEY': self._api_key,
+        })
+
+
+class VidioIE(VidioBaseIE):
     _VALID_URL = r'https?://(?:www\.)?vidio\.com/watch/(?P<id>\d+)-(?P<display_id>[^/?#&]+)'
     _TESTS = [{
         'url': 'http://www.vidio.com/watch/165683-dj_ambred-booyah-live-2015',
@@ -41,24 +91,38 @@ class VidioIE(InfoExtractor):
     }, {
         'url': 'https://www.vidio.com/watch/77949-south-korea-test-fires-missile-that-can-strike-all-of-the-north',
         'only_matching': True,
+    }, {
+        # Premier-exclusive video
+        'url': 'https://www.vidio.com/watch/1550718-stand-by-me-doraemon',
+        'only_matching': True
     }]
 
-    def _real_initialize(self):
-        self._api_key = self._download_json(
-            'https://www.vidio.com/auth', None, data=b'')['api_key']
-
     def _real_extract(self, url):
         video_id, display_id = re.match(self._VALID_URL, url).groups()
-        data = self._download_json(
+        data = self._call_api('https://api.vidio.com/videos/' + video_id, display_id)
-            'https://api.vidio.com/videos/' + video_id, display_id, headers={
-                'Content-Type': 'application/vnd.api+json',
-                'X-API-KEY': self._api_key,
-            })
         video = data['videos'][0]
         title = video['title'].strip()
+        is_premium = video.get('is_premium')
 
+        if is_premium:
+            sources = self._download_json(
+                'https://www.vidio.com/interactions_stream.json?video_id=%s&type=videos' % video_id,
+                display_id, note='Downloading premier API JSON')
+            if not (sources.get('source') or sources.get('source_dash')):
+                self.raise_login_required('This video is only available for registered users with the appropriate subscription')
+
+            formats = []
+            if sources.get('source'):
+                formats.extend(self._extract_m3u8_formats(
+                    sources['source'], display_id, 'mp4', 'm3u8_native'))
+            if sources.get('source_dash'):  # TODO: Find video example with source_dash
+                formats.extend(self._extract_mpd_formats(
+                    sources['source_dash'], display_id, 'dash'))
+        else:
+            hls_url = data['clips'][0]['hls_url']
             formats = self._extract_m3u8_formats(
-            data['clips'][0]['hls_url'], display_id, 'mp4', 'm3u8_native')
+                hls_url, display_id, 'mp4', 'm3u8_native')
+
         self._sort_formats(formats)
 
         get_first = lambda x: try_get(data, lambda y: y[x + 's'][0], dict) or {}
@@ -87,3 +151,131 @@ class VidioIE(InfoExtractor):
             'comment_count': get_count('comments'),
             'tags': video.get('tag_list'),
         }
+
+
+class VidioPremierIE(VidioBaseIE):
+    _VALID_URL = r'https?://(?:www\.)?vidio\.com/premier/(?P<id>\d+)/(?P<display_id>[^/?#&]+)'
+    _TESTS = [{
+        'url': 'https://www.vidio.com/premier/2885/badai-pasti-berlalu',
+        'playlist_mincount': 14,
+    }, {
+        # Series with both free and premier-exclusive videos
+        'url': 'https://www.vidio.com/premier/2567/sosmed',
+        'only_matching': True,
+    }]
+
+    def _playlist_entries(self, playlist, series_id, series_name, season_name, display_id):
+        playlist_url = 'https://api.vidio.com/content_profiles/%s/playlists/%s/playlist_items' % (series_id, playlist['id'])
+
+        entries = []
+        index = 1
+        episode_index = 1
+        while playlist_url:
+            playlist_json = self._call_api(playlist_url, display_id, 'Downloading API JSON page %s' % index)
+            for video_json in playlist_json.get('data', []):
+                link = video_json['links']['watchpage']
+                result = self.url_result(link, 'Vidio', video_json['id'])
+                result.update({
+                    'series': series_name,
+                    'season': season_name,
+                    'episode': try_get(video_json, lambda x: x['attributes']['title']),
+                    'episode_number': episode_index,
+                })
+                entries.append(result)
+                episode_index += 1
+            playlist_url = try_get(playlist_json, lambda x: x['links']['next'])
+            index += 1
+        return entries
+
+    def _real_extract(self, url):
+        premier_id, display_id = re.match(self._VALID_URL, url).groups()
+        entries = []
+        playlist_data = self._call_api('https://www.vidio.com/api/series/%s' % premier_id, display_id)
+        # While the video entries are embedded within the series JSON metadata, they're (accidentally?) truncated on really long playlists so content profile API is still used
+        for playlist in playlist_data.get('seasons', []):
+            entries.extend(self._playlist_entries(
+                playlist, premier_id, playlist_data.get('title'), playlist.get('name'), display_id))
+        return self.playlist_result(
+            entries, premier_id, playlist_data.get('title'), playlist_data.get('description'))
+
+
+class VidioLiveIE(VidioBaseIE):
+    _VALID_URL = r'https?://(?:www\.)?vidio\.com/live/(?P<id>\d+)-(?P<display_id>[^/?#&]+)'
+    _TESTS = [{
+        'url': 'https://www.vidio.com/live/204-sctv',
+        'info_dict': {
+            'id': '204',
+            'title': 'SCTV',
+            'uploader': 'SCTV',
+            'uploader_id': 'sctv',
+            'thumbnail': r're:^https?://.*\.jpg$',
+        },
+    }, {
+        # Premier-exclusive livestream
+        'url': 'https://www.vidio.com/live/6362-tvn',
+        'only_matching': True,
+    }, {
+        # DRM premier-exclusive livestream
+        'url': 'https://www.vidio.com/live/6299-bein-1',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        video_id, display_id = re.match(self._VALID_URL, url).groups()
+        stream_data = self._call_api(
+            'https://www.vidio.com/api/livestreamings/%s/detail' % video_id, display_id)
+        stream_meta = stream_data['livestreamings'][0]
+        user = stream_data.get('users', [{}])[0]
+
+        title = stream_meta.get('title')
+        username = user.get('username')
+
+        formats = []
+        if stream_meta.get('is_drm'):
+            self.raise_no_formats(
+                'This video is DRM protected.', expected=True)
+
+        if stream_meta.get('is_premium'):
+            sources = self._download_json(
+                'https://www.vidio.com/interactions_stream.json?video_id=%s&type=livestreamings' % video_id,
+                display_id, note='Downloading premier API JSON')
+            if not (sources.get('source') or sources.get('source_dash')):
+                self.raise_login_required('This video is only available for registered users with the appropriate subscription')
+
+            if sources.get('source'):
+                token_json = self._download_json(
+                    'https://www.vidio.com/live/%s/tokens' % video_id,
+                    display_id, note='Downloading HLS token JSON', data=b'')
+                formats.extend(self._extract_m3u8_formats(
+                    sources['source'] + '?' + token_json.get('token', ''), display_id, 'mp4', 'm3u8_native'))
+            if sources.get('source_dash'):
+                pass
+        else:
+            if stream_meta.get('stream_token_url'):
+                token_json = self._download_json(
+                    'https://www.vidio.com/live/%s/tokens' % video_id,
+                    display_id, note='Downloading HLS token JSON', data=b'')
+                formats.extend(self._extract_m3u8_formats(
+                    stream_meta['stream_token_url'] + '?' + token_json.get('token', ''), display_id, 'mp4', 'm3u8_native'))
+            if stream_meta.get('stream_dash_url'):
+                pass
+            if stream_meta.get('stream_url'):
+                formats.extend(self._extract_m3u8_formats(
+                    stream_meta['stream_url'], display_id, 'mp4', 'm3u8_native'))
+        self._sort_formats(formats)
+
+        return {
+            'id': video_id,
+            'display_id': display_id,
+            'title': title,
+            'is_live': True,
+            'description': strip_or_none(stream_meta.get('description')),
+            'thumbnail': stream_meta.get('image'),
+            'like_count': int_or_none(stream_meta.get('like')),
+            'dislike_count': int_or_none(stream_meta.get('dislike')),
+            'formats': formats,
+            'uploader': user.get('name'),
+            'timestamp': parse_iso8601(stream_meta.get('start_time')),
+            'uploader_id': username,
+            'uploader_url': 'https://www.vidio.com/@' + username if username else None,
+        }

youtube_dl/extractor/youtube.py

@@ -692,9 +692,9 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         'invidious': '|'.join(_INVIDIOUS_SITES),
     }
     _PLAYER_INFO_RE = (
-        r'/s/player/(?P<id>[a-zA-Z0-9_-]{8,})//(?:tv-)?player',
+        r'/s/player/(?P<id>[a-zA-Z0-9_-]{8,})/(?:tv-)?player',
-        r'/(?P<id>[a-zA-Z0-9_-]{8,})/player(?:_ias\.vflset(?:/[a-zA-Z]{2,3}_[a-zA-Z]{2,3})?|-plasma-ias-(?:phone|tablet)-[a-z]{2}_[A-Z]{2}\.vflset)/base\.js$',
+        r'/(?P<id>[a-zA-Z0-9_-]{8,})/player(?:_ias(?:_tce)?\.vflset(?:/[a-zA-Z]{2,3}_[a-zA-Z]{2,3})?|-plasma-ias-(?:phone|tablet)-[a-z]{2}_[A-Z]{2}\.vflset)/base\.js$',
-        r'\b(?P<id>vfl[a-zA-Z0-9_-]+)\b.*?\.js$',
+        r'\b(?P<id>vfl[a-zA-Z0-9_-]{6,})\b.*?\.js$',
     )
     _SUBTITLE_FORMATS = ('json3', 'srv1', 'srv2', 'srv3', 'ttml', 'vtt')
 
@@ -1626,15 +1626,13 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         """ Return a string representation of a signature """
         return '.'.join(compat_str(len(part)) for part in example_sig.split('.'))
 
-    @classmethod
+    def _extract_player_info(self, player_url):
-    def _extract_player_info(cls, player_url):
+        try:
-        for player_re in cls._PLAYER_INFO_RE:
+            return self._search_regex(
-            id_m = re.search(player_re, player_url)
+                self._PLAYER_INFO_RE, player_url, 'player info', group='id')
-            if id_m:
+        except ExtractorError as e:
-                break
+            raise ExtractorError(
-        else:
+                'Cannot identify player %r' % (player_url,), cause=e)
-            raise ExtractorError('Cannot identify player %r' % player_url)
-        return id_m.group('id')
 
     def _load_player(self, video_id, player_url, fatal=True, player_id=None):
         if not player_id:
@@ -1711,6 +1709,23 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 '    return %s\n') % (signature_id_tuple, expr_code)
         self.to_screen('Extracted signature function:\n' + code)
 
+    def _extract_sig_fn(self, jsi, funcname):
+        var_ay = self._search_regex(
+            r'''(?x)
+                (?:\*/|\{|\n|^)\s*(?:'[^']+'\s*;\s*)
+                    (var\s*[\w$]+\s*=\s*(?:
+                        ('|")(?:\\\2|(?!\2).)+\2\s*\.\s*split\(\s*('|")\W+\3\s*\)|
+                        \[\s*(?:('|")(?:\\\4|(?!\4).)*\4\s*(?:(?=\])|,\s*))+\]
+                    ))(?=\s*[,;])
+            ''', jsi.code, 'useful values', default='')
+
+        sig_fn = jsi.extract_function_code(funcname)
+
+        if var_ay:
+            sig_fn = (sig_fn[0], ';\n'.join((var_ay, sig_fn[1])))
+
+        return sig_fn
+
     def _parse_sig_js(self, jscode):
         # Examples where `sig` is funcname:
         # sig=function(a){a=a.split(""); ... ;return a.join("")};
@@ -1736,8 +1751,12 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             jscode, 'Initial JS player signature function name', group='sig')
 
         jsi = JSInterpreter(jscode)
-        initial_function = jsi.extract_function(funcname)
+
-        return lambda s: initial_function([s])
+        initial_function = self._extract_sig_fn(jsi, funcname)
+
+        func = jsi.extract_function_from_code(*initial_function)
+
+        return lambda s: func([s])
 
     def _cached(self, func, *cache_id):
         def inner(*args, **kwargs):
@@ -1856,15 +1875,9 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
 
     def _extract_n_function_code_jsi(self, video_id, jsi, player_id=None):
 
-        var_ay = self._search_regex(
-            r'(?:[;\s]|^)\s*(var\s*[\w$]+\s*=\s*"(?:\\"|[^"])+"\s*\.\s*split\("\W+"\))(?=\s*[,;])',
-            jsi.code, 'useful values', default='')
-
         func_name = self._extract_n_function_name(jsi.code)
 
-        func_code = jsi.extract_function_code(func_name)
+        func_code = self._extract_sig_fn(jsi, func_name)
-        if var_ay:
-            func_code = (func_code[0], ';\n'.join((var_ay, func_code[1])))
 
         if player_id:
             self.cache.store('youtube-nsig', player_id, func_code)
@@ -2136,7 +2149,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                     video_details = merge_dicts(*traverse_obj(
                         (player_response, api_player_response),
                         (Ellipsis, 'videoDetails', T(dict))))
-                    player_response.update(api_player_response or {})
+                    player_response.update(filter_dict(
+                        api_player_response or {}, cndn=lambda k, _: k != 'captions'))
                     player_response['videoDetails'] = video_details
 
         def is_agegated(playability):
@@ -2566,8 +2580,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         }
 
         pctr = traverse_obj(
-            player_response,
+            (player_response, api_player_response),
-            ('captions', 'playerCaptionsTracklistRenderer', T(dict)))
+            (Ellipsis, 'captions', 'playerCaptionsTracklistRenderer', T(dict)))
         if pctr:
             def process_language(container, base_url, lang_code, query):
                 lang_subs = []
@@ -2584,20 +2598,21 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             def process_subtitles():
                 subtitles = {}
                 for caption_track in traverse_obj(pctr, (
-                        'captionTracks', lambda _, v: v.get('baseUrl'))):
+                        Ellipsis, 'captionTracks', lambda _, v: (
+                            v.get('baseUrl') and v.get('languageCode')))):
                     base_url = self._yt_urljoin(caption_track['baseUrl'])
                     if not base_url:
                         continue
+                    lang_code = caption_track['languageCode']
                     if caption_track.get('kind') != 'asr':
-                        lang_code = caption_track.get('languageCode')
-                        if not lang_code:
-                            continue
                         process_language(
                             subtitles, base_url, lang_code, {})
                         continue
                     automatic_captions = {}
+                    process_language(
+                        automatic_captions, base_url, lang_code, {})
                     for translation_language in traverse_obj(pctr, (
-                            'translationLanguages', lambda _, v: v.get('languageCode'))):
+                            Ellipsis, 'translationLanguages', lambda _, v: v.get('languageCode'))):
                         translation_language_code = translation_language['languageCode']
                         process_language(
                             automatic_captions, base_url, translation_language_code,

youtube_dl/jsinterp.py

@@ -678,7 +678,7 @@ class JSInterpreter(object):
             return len(obj)
         try:
             return obj[int(idx)] if isinstance(obj, list) else obj[compat_str(idx)]
-        except (TypeError, KeyError, IndexError) as e:
+        except (TypeError, KeyError, IndexError, ValueError) as e:
             # allow_undefined is None gives correct behaviour
             if allow_undefined or (
                     allow_undefined is None and not isinstance(e, TypeError)):
@@ -1038,6 +1038,10 @@ class JSInterpreter(object):
                     left_val = self._index(left_val, idx)
             if isinstance(idx, float):
                 idx = int(idx)
+            if isinstance(left_val, list) and len(left_val) <= int_or_none(idx, default=-1):
+                # JS Array is a sparsely assignable list
+                # TODO: handle extreme sparsity without memory bloat, eg using auxiliary dict
+                left_val.extend((idx - len(left_val) + 1) * [JS_Undefined])
             left_val[idx] = self._operator(
                 m.group('op'), self._index(left_val, idx) if m.group('op') else None,
                 m.group('expr'), expr, local_vars, allow_recursion)
@@ -1204,7 +1208,8 @@ class JSInterpreter(object):
                 elif member == 'join':
                     assertion(isinstance(obj, list), 'must be applied on a list')
                     assertion(len(argvals) <= 1, 'takes at most one argument')
-                    return (',' if len(argvals) == 0 else argvals[0]).join(
+                    return (',' if len(argvals) == 0 or argvals[0] in (None, JS_Undefined)
+                            else argvals[0]).join(
                                 ('' if x in (None, JS_Undefined) else _js_toString(x))
                                 for x in obj)
                 elif member == 'reverse':
@@ -1364,19 +1369,21 @@ class JSInterpreter(object):
         code, _ = self._separate_at_paren(func_m.group('code'))  # refine the match
         return self.build_arglist(func_m.group('args')), code
 
-    def extract_function(self, funcname):
+    def extract_function(self, funcname, *global_stack):
         return function_with_repr(
-            self.extract_function_from_code(*self.extract_function_code(funcname)),
+            self.extract_function_from_code(*itertools.chain(
+                self.extract_function_code(funcname), global_stack)),
             'F<%s>' % (funcname,))
 
     def extract_function_from_code(self, argnames, code, *global_stack):
         local_vars = {}
 
+        start = None
         while True:
-            mobj = re.search(r'function\((?P<args>[^)]*)\)\s*{', code)
+            mobj = re.search(r'function\((?P<args>[^)]*)\)\s*{', code[start:])
             if mobj is None:
                 break
-            start, body_start = mobj.span()
+            start, body_start = ((start or 0) + x for x in mobj.span())
             body, remaining = self._separate_at_paren(code[body_start - 1:])
             name = self._named_object(local_vars, self.extract_function_from_code(
                 [x.strip() for x in mobj.group('args').split(',')],