Slightly off-topic, but I realized that sites which really want the video to play will start playing the video when you scroll. I believe this works because the

Slightly off-topic, but I realized that sites which really want the video to play will start playing the video when you scroll. I believe this works because the scroll event is considered user-triggered, and sticking the "play video" trigger on that event means the browser won't block it. This is gross. NoScript fixes pretty much all of these workarounds. But I don't need to use that really; sites which autoplay video have an "x" button in the tab, which stops the video from playing. I just use that, and move on.