No youtube playlist videos to be found - maybe API key not set ? This is the feed - https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&playlistId=PLObgv_vWLPXoxPdmlaSS_IMVPT5vzfWE6&key=AIzaSyARhUPOoz4i1SI_5IU9Mi-J0miBike2Dkc&maxResults=50

Requests from referer are blocked.