[tvc:embed] Add embed extraction routine

youtube_dl/extractor/tvc.py

@@ -1,6 +1,8 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
+import re
+
 from .common import InfoExtractor
 from ..utils import (
     clean_html,
@@ -22,6 +24,13 @@ class TVCEmbedIE(InfoExtractor):
         },
     }
 
+    @classmethod
+    def _extract_url(cls, webpage):
+        mobj = re.search(
+            r'<iframe[^>]+?src=(["\'])(?P<url>(?:http://)?(?:www\.)?tvc\.ru/video/iframe/id/[^"]+)\1', webpage)
+        if mobj:
+            return mobj.group('url')
+
     def _real_extract(self, url):
         video_id = self._match_id(url)