[twitch] Skip a 404 test

youtube_dl/extractor/twitch.py

@@ -247,6 +247,7 @@ class TwitchVodIE(TwitchItemBaseIE):
             # m3u8 download
             'skip_download': True,
         },
+        'skip': 'HTTP Error 404: Not Found',
     }]
 
     def _real_extract(self, url):