digdug

You could set up btrfs snapshots, too. Of course, don’t forget to take a snapshot before you break your configs.

The viewing options OP listed should all work with AV1, I think they were just worried by the preset names. Plus, hardware support should only get better.

OP, you should be able to adjust settings after you select a preset, so you can pick different dimensions/frame rates/audio codecs/etc.

Side note, I’ve found that the matroska container is the easiest one for me to use if I want better subtitle support.