same with some old games/apps, they work still perfectly on my older iPhone with newest updates, yet due to changing the store and developers not "updating" them they are no longer available for me.
moved to android, with linageOS.
It seems almost every "cloud" based system has a built-in time bomb.
I'm now getting notices that Amazon is closing some of its services.
Once things are no longer profitable, or technology shifts your stuff is quickly abandoned.
Microsoft Groove Music anyone?
According to this community post (https://discussions.apple.com/thread/253966277) that implies that DRM'd content is not available in those countries, and that you'll need to download your movies and for them to work depending on the country you're visiting.
If you're coming over for a temporary visit, setting up a VPN on your home network may be a good idea. Many American services are not available in other countries, even if you're a paying customer.
Streaming services will even edit or censor movies as they please.
https://variety.com/2019/digital/news/hbo-edits-game-of-thro...!
https://scribe.citizen4.eu/everything-80s/why-are-streaming-...
Honestly the only way to preserve most digital-only video media today is piracy.