Movies purchases disappeared from Samsung TV

Re: "It’s not even listed under the movies that I purchased. I never downloaded it. The movie isn’t under my account in the web"

Seems the movie may have been rented for a short period / viewed from a streaming service.

Else: Could it have been purchased with a different Apple Account, or hidden.

If needed: Apple TV Support website : TV Support — Official Apple Support

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Umm... just did a search for Apple + studio gibbli movies online.

I found this link Studio Ghibli - Apple TV+

but clicking the link revealed an otherwise blank page with:

Movies do take up memory / storage space ... check if you have enough for the movies.

You may be able to re-download purchased movies:

See how to: Redownload TV shows and movies that you purchased - Apple Support

and

if needed: Learn what to do if you can't re-download an item or if you can't see the item in your purchases.

If there’s an issue when you redownload apps, movies, or other content from Apple - Apple Support