There was a radio segment last week on boston public radio where Andy Ihnatko explained as stuff floats into the public domain, some of our new media only comes out on digital streaming formats and without piracy copies would probably would never become public domain. This a future problem but potentially a real one.
Or you could buy physical media.
This article is literally about being unable to play your physical media because your computer is too new.
I have UHD rips from blue-rays that I own made with makemkv. As far as I can tell, doing the rips for personal use is 100% allowed in my jurisdiction. If anything the fact that newer machines can't play them back would strengthen my fair-use case. These are personal-use copies of physical media that I own, which does not fall under most peoples definition of piracy.