If there are Twitch videos in a thread, they all start playing at the same time the moment you enter the thread, even if you are not looking at them. This is bad for data plans on mobile, as you can't stop them from playing except to scroll up through possibly hundreds of posts to find the video and pause it. If there are more than one video, they all begin loudly playing at once, it is insane. Some of our threads are going to be tens of thousands of posts long-- it will soon become impossible to scroll up through posts at some point to pause twitch videos. It is a massive bug, and possible exploit of this site. There is no problem with other forms of video like youtube.