This is a side complaint on YT but I have purchased so many UHD movies and they only stream in 480P. I think you have to have some kind of YouTube certified device to play it in UHD but annoying.
Also, it’s actually easier to bypass the DRM crap than not, so they’ll continue to play in full resolution moving forward.
I want to point out I'm still an apt dweller unfortunately
You can also get discs from most libraries, book stores, many garage sails, ebay, for super cheap.
Alternatively, be like me, and have a $100 budget for N ~= 20 BluRays/40 DVDs. 2-3 can be new purchases if used isn't in stock.