Why won’t Apple TV app on PS5 play certain movies?

I have a heap of movies in my library that I’ve purchased. My PS5 is plugged into a PC monitor (could be the monitor?), and app is up to date, but when I go to play Harry Potter - Chamber of Secrets, it comes up with Content Unavailable Error. This type of content is not currently compatible with your device etc. I don’t understand how every other film plays fine on this setup, but this one in particular won’t? HP film works fine on my iPhone.