-            r'<title>(.*?)</title>', webpage, 'title')
-        video_url = self.http_scheme() + self._search_regex(
-            r'<source src="(.*?)" type="video/mp4">', webpage, 'video URL')
-        thumbnail_url = self._search_regex(
-            r'<img id="video-thumbnail" src="(.*?)"',
-            webpage, 'thumbnail url', fatal=False)
-        thumbnail = (
-            thumbnail_url if thumbnail_url is None
-            else self.http_scheme() + thumbnail_url)
+            r'<title>(.+?)</title>', webpage,
+            'title', default=None) or self._og_search_title(webpage)
+        video_url = self._proto_relative_url(self._search_regex(
+            r'<source[^>]+src=(["\'])(?P<url>.+?)\1',
+            webpage, 'video URL', default=None,
+            group='url')) or self._og_search_video_url(webpage)
+        thumbnail = self._proto_relative_url(self._search_regex(
+            r'<img[^>]+id=["\']video-thumbnail["\'][^>]+src=(["\'])(?P<url>.+?)\1',
+            webpage, 'thumbnail url', default=None,
+            group='url')) or self._og_search_thumbnail(webpage)