[youtube] Fix protocol-independent URLs (Fixes #1768)

[youtube-dl] / youtube_dl / extractor / common.py

diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index e0ccba533534709b6ce65af518ca16fadee0c4ea..9c20d30b4fe844812e0dc7441e796cc604e7c96f 100644 (file)
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -322,6 +322,8 @@ class InfoExtractor(object):
         if name is None:
             name = 'OpenGraph %s' % prop
         escaped = self._search_regex(self._og_regex(prop), html, name, flags=re.DOTALL, **kargs)
+        if escaped is None:
+            return None
         return unescapeHTML(escaped)
 
     def _og_search_thumbnail(self, html, **kargs):