I have this set to false and it's pretty annoying. It seems that the same triggers that make auto-play work are used to play regular video. So I always have to fiddle with Youtube to get a video to start, and Vimeo videos don't play at all. I've had to keep from using this flag in Chrome so I have a backup browser for such sites.

Thanks, that worked, although YouTube affected, too. Well, better than unexpected auto-play.

There's a plugin that disables autoplay.

https://github.com/Eloston/disable-html5-autoplay https://chrome.google.com/webstore/detail/disable-html5-auto...