Dieter Hopf Portentosa Evolucion Nr.4851

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=PVPsd1kYR3_gqaMLZVDbQDJIG0ebLwDr&key=AIzaSyDD5qFtvhPJxKvjUomTE_qCHWQZfszyoUQ&maxResults=2

The playlist identified with the request's playlistId parameter cannot be found.