From 2bf0634d16b5732548652093d77dbd1aa76e8189 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Mon, 7 Dec 2020 01:48:10 +0700
Subject: [PATCH] [youtube] Improve youtu.be extraction in non-existing
 playlists (closes #27324)

---
 youtube_dl/extractor/extractors.py |  1 +
 youtube_dl/extractor/youtube.py    | 55 +++++++++++++++++++-----------
 2 files changed, 36 insertions(+), 20 deletions(-)

diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 03aff1d52..575b4b36f 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -1520,6 +1520,7 @@ from .youtube import (
     YoutubeSubscriptionsIE,
     YoutubeTruncatedIDIE,
     YoutubeTruncatedURLIE,
+    YoutubeYtBeIE,
     YoutubeYtUserIE,
     YoutubeWatchLaterIE,
 )
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index b796f58b2..b8219a0ad 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -3139,8 +3139,7 @@ class YoutubePlaylistIE(InfoExtractor):
                         (?:
                             (?:
                                 youtube(?:kids)?\.com|
-                                invidio\.us|
-                                youtu\.be
+                                invidio\.us
                             )
                             /.*?\?.*?\blist=
                         )?
@@ -3185,6 +3184,32 @@ class YoutubePlaylistIE(InfoExtractor):
             'uploader_id': 'UC21nz3_MesPLqtDqwdvnoxA',
         }
     }, {
+        'url': 'TLGGrESM50VT6acwMjAyMjAxNw',
+        'only_matching': True,
+    }, {
+        # music album playlist
+        'url': 'OLAK5uy_m4xAFdmMC5rX3Ji3g93pQe3hqLZw_9LhM',
+        'only_matching': True,
+    }]
+
+    @classmethod
+    def suitable(cls, url):
+        return False if YoutubeTabIE.suitable(url) else super(
+            YoutubePlaylistIE, cls).suitable(url)
+
+    def _real_extract(self, url):
+        playlist_id = self._match_id(url)
+        qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+        if not qs:
+            qs = {'list': playlist_id}
+        return self.url_result(
+            update_url_query('https://www.youtube.com/playlist', qs),
+            ie=YoutubeTabIE.ie_key(), video_id=playlist_id)
+
+
+class YoutubeYtBeIE(InfoExtractor):
+    _VALID_URL = r'https?://youtu\.be/(?P<id>[0-9A-Za-z_-]{11})/*?.*?\blist=(?P<playlist_id>%(playlist_id)s)' % {'playlist_id': YoutubeBaseInfoExtractor._PLAYLIST_ID_RE}
+    _TESTS = [{
         'url': 'https://youtu.be/yeWKywCrFtk?list=PL2qgrgXsNUG5ig9cat4ohreBjYLAPC0J5',
         'info_dict': {
             'id': 'yeWKywCrFtk',
@@ -3207,28 +3232,18 @@ class YoutubePlaylistIE(InfoExtractor):
     }, {
         'url': 'https://youtu.be/uWyaPkt-VOI?list=PL9D9FC436B881BA21',
         'only_matching': True,
-    }, {
-        'url': 'TLGGrESM50VT6acwMjAyMjAxNw',
-        'only_matching': True,
-    }, {
-        # music album playlist
-        'url': 'OLAK5uy_m4xAFdmMC5rX3Ji3g93pQe3hqLZw_9LhM',
-        'only_matching': True,
     }]
 
-    @classmethod
-    def suitable(cls, url):
-        return False if YoutubeTabIE.suitable(url) else super(
-            YoutubePlaylistIE, cls).suitable(url)
-
     def _real_extract(self, url):
-        playlist_id = self._match_id(url)
-        qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
-        if not qs:
-            qs = {'list': playlist_id}
+        mobj = re.match(self._VALID_URL, url)
+        video_id = mobj.group('id')
+        playlist_id = mobj.group('playlist_id')
         return self.url_result(
-            update_url_query('https://www.youtube.com/playlist', qs),
-            ie=YoutubeTabIE.ie_key(), video_id=playlist_id)
+            update_url_query('https://www.youtube.com/watch', {
+                'v': video_id,
+                'list': playlist_id,
+                'feature': 'youtu.be',
+            }), ie=YoutubeTabIE.ie_key(), video_id=playlist_id)
 
 
 class YoutubeYtUserIE(InfoExtractor):