+        def extract_file_url(html, default=NO_DEFAULT):
+            return self._search_regex(
+                r'file:\s*"(http[^\"]+)",', html, 'file url', default=default)
+
+        video_url = extract_file_url(webpage, default=None)
+
+        if not video_url:
+            embed_url = self._search_regex(
+                r'<iframe[^>]+src=(["\'])(?P<url>(?:https?://)?vodlocker\.(?:com|city)/embed-.+?)\1',
+                webpage, 'embed url', group='url')
+            embed_webpage = self._download_webpage(
+                embed_url, video_id, 'Downloading embed webpage')
+            video_url = extract_file_url(embed_webpage)
+            thumbnail_webpage = embed_webpage
+        else:
+            thumbnail_webpage = webpage
+