-        webpage = self._download_webpage(url, display_id)
-
-        video_id = self._html_search_regex(
-            r'<li class="video-preview current_playing" id="(\d+)">', webpage, 'video id')
+        if not video_id:
+            webpage = self._download_webpage(url, display_id)
+            video_id = self._html_search_regex(
+                r'<li class="video-preview current_playing" id="(\d+)">',
+                webpage, 'video id')