Does this work for all sites? I'm pretty sure I've done that but now and again I get a site that seems to ignore it.
Chrome does not, but Edge lets you do it.
Well, which Edge and how? Because I'm using Chromium Edge, have enabled the option "Show block option in autoplay settings" in edge://flags/, changed the "Media autoplay" option to "Block"... and it still autoplays videos.
Is that the case for all websites? I wouldn't be surprised if some particularly abusive websites are exploiting a bug to keep their videos playing