Positive Possibility Tips

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=PLq2CTEz8u3BDbJg51rlDXpuO67aRk4rWg"&key=AIzaSyCtrnD7ll8wyyro5f1LitPggaSKvYFIvU4&maxResults=50
The playlist identified with the requests playlistId parameter cannot be found.