[youtube] Fix extraction (closes #20758, closes #20759, closes #20761, …

…closes #20762, closes #20764, closes #20766, closes #20767, closes #20769, closes #20771, closes #20768, closes #20770)

youtube_dl/extractor/youtube.py

@@ -1652,7 +1652,8 @@ def extract_view_count(v_info):
                         view_count = extract_view_count(get_video_info)
                     if not video_info:
                         video_info = get_video_info
-                    if 'token' in get_video_info:
+                    get_token = get_video_info.get('token') or get_video_info.get('account_playback_token')
+                    if get_token:
                         # Different get_video_info requests may report different results, e.g.
                         # some may report video unavailability, but some may serve it without
                         # any complaint (see https://github.com/ytdl-org/youtube-dl/issues/7362,
@@ -1662,7 +1663,8 @@ def extract_view_count(v_info):
                         # due to YouTube measures against IP ranges of hosting providers.
                         # Working around by preferring the first succeeded video_info containing
                         # the token if no such video_info yet was found.
-                        if 'token' not in video_info:
+                        token = video_info.get('token') or video_info.get('account_playback_token')
+                        if not token:
                             video_info = get_video_info
                         break
 
@@ -1678,7 +1680,8 @@ def extract_unavailable_message():
             raise ExtractorError(
                 'YouTube said: %s' % unavailable_message, expected=True, video_id=video_id)
 
-        if 'token' not in video_info:
+        token = video_info.get('token') or video_info.get('account_playback_token')
+        if not token:
             if 'reason' in video_info:
                 if 'The uploader has not made this video available in your country.' in video_info['reason']:
                     regions_allowed = self._html_search_meta(