Prevent (almost) all videos from autoplay
YouTube was actually not tested, but YouTube has it's own handful of scripts to handle it. YouTube embeds, videojs, and native html5 autoplay are stopped in my testing. YouTube is one site, so my statement still holds true.
Far from `almost all`.
For example here
https://www.youtube.com/channel/UCBXI22RrWXFmc6PK1iKutXQ
https://www.youtube.com/watch?v=y_BFY9W0evw&list=PLqSTFWHJscVdnb1bqUkB5D7p4ADk7MMys&index=2&t=2