Some of my movies that I purchased through the Apple iTunes app on my Samsung no longer play.

Some of my movies that I purchased through the iTunes app on my Samsung no longer play. A note pops up saying it's an incompatible file that needs an Apple device. However, the same movies played recently but now no longer do. Many of my other movies also play but the aforementioned ones no longer do. What has Apple done, what changes have they made that's caused this problem? I've purchased hundreds of movies and now am reluctant to buy anymore because of this unreliability. I reported it to Apple and am awaiting an answer or solution but in the meantime, this problem persists. So frustrating when I did nothing on my end to cause this problem.