[fix] Unable to extract JS player URL

Closes #12

youtube_dl/extractor/youtube.py

@@ -1955,7 +1955,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
 
                 if cipher:
                     if 's' in url_data or self._downloader.params.get('youtube_include_dash_manifest', True):
-                        ASSETS_RE = r'"assets":.+?"js":\s*("[^"]+")'
+                        ASSETS_RE = [ r'"assets":.+?"js":\s*("[^"]+")', r'"jsUrl":("[^"]+")' ]
                         jsplayer_url_json = self._search_regex(
                             ASSETS_RE,
                             embed_webpage if age_gate else video_webpage,