Fix broken signature decryption

The base.js url format changed, so the identifier at the end
was no longer unique. So it was using the wrong cached decryption
function

Changes the identifier to just be the whole url so
this won't happen again.

youtube/yt_data_extract/watch_extraction.py

@@ -458,7 +458,8 @@ def extract_watch_info(polymer_json):
     info['base_js'] = deep_get(top_level, 'player', 'assets', 'js')
     if info['base_js']:
         info['base_js'] = normalize_url(info['base_js'])
-        info['player_name'] = get(info['base_js'].split('/'), -2)
+        # must uniquely identify url
+        info['player_name'] = urllib.parse.urlparse(info['base_js']).path
     else:
         info['player_name'] = None