Now you can find the same 4K video from few GBs to a hundred GBs, and I am wondering: where to stop? With music there is a similar phenomenon by which after a certain bitrate it becomes an esoteric art to detect improvements. So, what is your “very good enough” bitrate for 4K videos?
One consideration for me is: how grainy is the source material, and how much do I care about retaining that? Because film grain is the first thing to go when you apply too much compression. Dark scenes, too.
For kids movies or something I’ll watch casually: 15gb x265 rips are fine.
For new releases that I want to watch and maybe will a few more times: I’ll grab the 20-30gb web-dl and enjoy that.
For a movie I consider a masterpiece and want the best possible? Give me the 50-80gb remux.