[MTV] Improve mgid extraction (#1713)

Original PR: https://github.com/ytdl-org/youtube-dl/pull/30149
Fixes: #713, #1580, https://github.com/ytdl-org/youtube-dl/issues/30139

Authored by: Sipherdrakon, kikuyan

yt_dlp/extractor/mtv.py

@@ -306,21 +306,23 @@ class MTVServicesInfoExtractor(InfoExtractor):
         if not mgid:
             mgid = self._extract_triforce_mgid(webpage)
 
-        if not mgid:
-            mgid = self._search_regex(
-                r'"videoConfig":{"videoId":"(mgid:.*?)"', webpage, 'mgid', default=None)
-
-        if not mgid:
-            mgid = self._search_regex(
-                r'"media":{"video":{"config":{"uri":"(mgid:.*?)"', webpage, 'mgid', default=None)
-
         if not mgid:
             data = self._parse_json(self._search_regex(
                 r'__DATA__\s*=\s*({.+?});', webpage, 'data'), None)
             main_container = self._extract_child_with_type(data, 'MainContainer')
             ab_testing = self._extract_child_with_type(main_container, 'ABTesting')
             video_player = self._extract_child_with_type(ab_testing or main_container, 'VideoPlayer')
-            mgid = video_player['props']['media']['video']['config']['uri']
+            if video_player:
+                mgid = try_get(video_player, lambda x: x['props']['media']['video']['config']['uri'])
+            else:
+                flex_wrapper = self._extract_child_with_type(ab_testing or main_container, 'FlexWrapper')
+                auth_suite_wrapper = self._extract_child_with_type(flex_wrapper, 'AuthSuiteWrapper')
+                player = self._extract_child_with_type(auth_suite_wrapper or flex_wrapper, 'Player')
+                if player:
+                    mgid = try_get(player, lambda x: x['props']['videoDetail']['mgid'])
+
+        if not mgid:
+            raise ExtractorError('Could not extract mgid')
 
         return mgid
 

yt_dlp/extractor/southpark.py

@@ -6,19 +6,18 @@ from .mtv import MTVServicesInfoExtractor
 
 class SouthParkIE(MTVServicesInfoExtractor):
     IE_NAME = 'southpark.cc.com'
-    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark(?:\.cc|studios)\.com/(?:clips|(?:full-)?episodes|collections)/(?P<id>.+?)(\?|#|$))'
+    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark(?:\.cc|studios)\.com/((?:video-)?clips|(?:full-)?episodes|collections)/(?P<id>.+?)(\?|#|$))'
 
     _FEED_URL = 'http://feeds.mtvnservices.com/od/feed/intl-mrss-player-feed'
 
     _TESTS = [{
-        'url': 'http://southpark.cc.com/clips/104437/bat-daded#tab=featured',
+        'url': 'https://southpark.cc.com/video-clips/d7wr06/south-park-you-all-agreed-to-counseling',
         'info_dict': {
-            'id': 'a7bff6c2-ed00-11e0-aca6-0026b9414f30',
             'ext': 'mp4',
-            'title': 'South Park|Bat Daded',
-            'description': 'Randy disqualifies South Park by getting into a fight with Bat Dad.',
-            'timestamp': 1112760000,
-            'upload_date': '20050406',
+            'title': 'You All Agreed to Counseling',
+            'description': 'Kenny, Cartman, Stan, and Kyle visit Mr. Mackey and ask for his help getting Mrs. Nelson to come back. Mr. Mackey reveals the only way to get things back to normal is to get the teachers vaccinated.',
+            'timestamp': 1615352400,
+            'upload_date': '20210310',
         },
     }, {
         'url': 'http://southpark.cc.com/collections/7758/fan-favorites/1',
@@ -40,11 +39,11 @@ class SouthParkIE(MTVServicesInfoExtractor):
 
 class SouthParkEsIE(SouthParkIE):
     IE_NAME = 'southpark.cc.com:español'
-    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.cc\.com/episodios-en-espanol/(?P<id>.+?)(\?|#|$))'
+    _VALID_URL = r'https?://(?:www\.)?(?P<url>southpark\.cc\.com/es/episodios/(?P<id>.+?)(\?|#|$))'
     _LANG = 'es'
 
     _TESTS = [{
-        'url': 'http://southpark.cc.com/episodios-en-espanol/s01e01-cartman-consigue-una-sonda-anal#source=351c1323-0b96-402d-a8b9-40d01b2e9bde&position=1&sort=!airdate',
+        'url': 'http://southpark.cc.com/es/episodios/s01e01-cartman-consigue-una-sonda-anal#source=351c1323-0b96-402d-a8b9-40d01b2e9bde&position=1&sort=!airdate',
         'info_dict': {
             'title': 'Cartman Consigue Una Sonda Anal',
             'description': 'Cartman Consigue Una Sonda Anal',