Extract thumbnail with _og_search_thumbnail

youtube_dl/extractor/metacafe.py

@@ -166,7 +166,7 @@ class MetacafeIE(InfoExtractor):
 
         video_title = self._html_search_regex(r'(?im)<title>(.*) - Video</title>', webpage, u'title')
         description = self._og_search_description(webpage)
-        thumbnail = self._html_search_regex(r'<meta property="og:image" content="([^"].+?)(?is)"', webpage, u'thumbnail',default='')
+        thumbnail = self._og_search_thumbnail(webpage)
         video_uploader = self._html_search_regex(
                 r'submitter=(.*?);|googletag\.pubads\(\)\.setTargeting\("(?:channel|submiter)","([^"]+)"\);',
                 webpage, u'uploader nickname', fatal=False)