[youtube] Fix lazy extractors (closes #28780)

youtube_dl/extractor/youtube.py

@@ -1219,6 +1219,9 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
 
     @classmethod
     def suitable(cls, url):
+        # Hack for lazy extractors until more generic solution is implemented
+        # (see #28780)
+        from .youtube import parse_qs
         qs = parse_qs(url)
         if qs.get('list', [None])[0]:
             return False
@@ -2910,6 +2913,9 @@ class YoutubePlaylistIE(InfoExtractor):
     def suitable(cls, url):
         if YoutubeTabIE.suitable(url):
             return False
+        # Hack for lazy extractors until more generic solution is implemented
+        # (see #28780)
+        from .youtube import parse_qs
         qs = parse_qs(url)
         if qs.get('v', [None])[0]:
             return False