Thanks for reaching out to the Apple Support Communities.
I see that you are trying to play movies from your iTunes account, but some only play audio while a few will start and the picture goes black. It's important to make sure that you can watch your movies without any issues, so I'm happy to help.
I suggest trying the steps in this support article:
If you can‘t stream or watch video content from the iTunes Store or third-party apps
Let me know if you have any questions.
Cheers.