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=PLD1UgPQmL1N5cT7W1j0c-sfSFMij_ZWwm&key=AIzaSyCxz4pAMRB4zFqCRXG1jtxe-vB0oH_cg30&maxResults=50
Bad Request

Levenslessen die wellicht vooruit kunnen helpen.