I cannot stream the downloaded movie that I purchased

To begin let me start by saying I’m new to all of this… meaning that my level of experience is what I’m sure that most would rate in the negative digits.

Having said that, you’ll have to excuse my technical terminology lol.

I just recently purchased and downloaded my first movie on Apple TV. I did purchase it and downloaded it with the app on my iPhone XR without any problems. Everything went smoothly as it should. But now when trying to watch the movie on my ROKU, I cannot seem to get it to play. All it does is show the little buffering circle in the middle of the screen and then finally shows a message saying that “this video is t formatted to be screened”.

Any help with advice or suggestions would be greatly appreciated.

Thanks

coumtry_stateofmind