-        video_url = self._html_search_regex(r"video_url: '(.+?)/?',", webpage, 'video URL')
-        thumbnail = self._html_search_regex(r"preview_url: '(.+?)/?',", webpage, 'video thumbnail', fatal=False)
+        video_url = self._search_regex(
+            r"video_url\s*:\s*'(.+?)/?',", webpage, 'video URL')
+        thumbnail = self._search_regex(
+            r"preview_url\s*:\s*'(.+?)/?',", webpage, 'thumbnail', fatal=False)