Which is fine to me. If I go to a website specifically for videos, I want it to autoplay, having to press play is a pointless action.

If I go to a website to read articles, I do not want autoplay, and I definitely don't want the video to even follow me around as a tiny minimized window when I scroll down and yes I will close the tab or press back pretty quick if that happens (as I come to the realization the effort to read this article is not worth the gain and realize that I probably was procrastinating anyway to end up on that article in the first place so should do something more productive). If it's interesting enough I will play the video myself, preferably with full control of its time slider myself and preferably without it auto-starting an unrelated different video after this one was done.