I am posting this to "Bugs", but it also fits into the "Accessibility" category.
There is a bug where every page of a given streamer's channel automatically autoplays mostly unrelated videos at what is usually maximum volume. Random channels will play behind/ above the UI on the page for selecting previous VODs. It will autoplay, even if I previously had the tab open and already muted and paused the video at the top. It will autoplay if I am scrolled all the way to the bottom of a streamer's archive, so that I have to scroll all the way back up to do it again. It will autoplay even if I am browsing other tabs.
I have to imagine this is a bug, because it makes navigating and enjoying Twitch incredibly difficult, tiring, and painful for a disabled person like me.
These are videos which I do not want to watch and did not click on. These are videos originally recorded at wildly varying volumes. A universal, sitewide "autoplay suggestions" bug is not welcome or needed. It makes Twitch.tv worse, on what feels like every page.
If you're referring to channel trailers and other stuff autoplaying, then resuming autoplay even if you hit pause... I agree. Super annoying and aggravating. Making me reconsider using Twitch again.