Here is the page in questions. It has several playlists. Some are working, most are not. Every playlist does have at least one video.
Hi @glennb, thanks for sharing the link demonstrating the issue. It looks like the affected playlists include hidden videos (e.g. Drying Videos - YouTube), so they cannot be displayed. Changing the privacy settings of the videos to “public” should resolve the issue.
Thank you. I saw this about 5 minutes before you responded. 