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&type=video&videoEmbeddable=true&playlistId=PLh5SyQNqWvpGFKdZPr5ZHddwZ0Khs_waf&key=AIzaSyBJ9g6q7cUJm-fsvMaIWxkm_i2WJ25cNwk&maxResults=50&order=date
Gallery beto_zabaleta_y_goyo_oviedo_playlist does not seem to have any videos.