[mtv] Fix some videos (#1453)

Partial fix for #713
Authored by: Sipherdrakon

yt_dlp/extractor/mtv.py

@@ -305,6 +305,14 @@ 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)
@@ -313,10 +321,6 @@ class MTVServicesInfoExtractor(InfoExtractor):
             video_player = self._extract_child_with_type(ab_testing or main_container, 'VideoPlayer')
             mgid = video_player['props']['media']['video']['config']['uri']
 
-        if not mgid:
-            mgid = self._search_regex(
-                r'"media":{"video":{"config":{"uri":"(mgid:.*?)"', webpage, 'mgid', default=None)
-
         return mgid
 
     def _real_extract(self, url):