Oh, thanks! I will look into this.

I’ve already started. Most of my YT viewing was from the smart TV app, and since I can’t block ads from there I simply don’t use it anymore. It’s still OK on PC, and on mobile I use Grayjay. On my TV, I just watch shows and anime nowadays instead.

Works for me as a preview in the comments, but tapping on it just shows a black screen.

Quick search came up with this: https://play.google.com/store/apps/details?id=com.watchfacestudio.az261jsoncodewatchface

Proton has a business plan, too.