Looking at the 4K HDR section of the Apple TV app on my Mac, I have 4 movies, all of them listed as 4K Dolby Vision. However, when I view the same section on my Apple TV device Movies app, only two of them play in 4K, the other two play in 480P, not even HD. Looking at the pull-down menu, they don't mention 4K or even HD.
Apple TV 4K (3rd generation)
The (iTunes) Movies app was decommissioned with tvOS 17.2 (December 2023). Store movies should now be watched in the Apple TV app (TV app).
About Apple TV 4K and Apple TV HD software updates - Apple Support
The (iTunes) Movies app was decommissioned with tvOS 17.2 (December 2023). Store movies should now be watched in the Apple TV app (TV app).
About Apple TV 4K and Apple TV HD software updates - Apple Support
At this time, and unless someone else chimes in with a new idea, I would suggest to contact an expert from the Apple Support staff for further assistance. Contact Apple for support and service (phone numbers) or start your support request online (chat/email/callback).
Hmmm...OK, but the same issue is there regardless of playing them through Movies app or Apple Tv app
480P on Apple TV Movies, but 4K on Mac Apple TV app
