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=PL679E78EE7CC414C5&key=AIzaSyCtrnD7ll8wyyro5f1LitPggaSKvYFIvU4&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=1049568874954