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=PLyp1C7YXOjpCsqq21MWA9300BA5upU3t0&key=AIzaSyDfDDHWTqJ6iOcASL3wLcpTvPWjmC-NnVk&maxResults=50

Daily Limit Exceeded. The quota will be reset at midnight Pacific Time (PT). You may monitor your quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/youtube.googleapis.com/quotas?project=710158092566