- Watch an embedded video.
- When it tries to auto-play to the next video, pause it.
- Scroll in the forums.
- Listen to the video restart every time a new group of posts load.
This is not a general complaint about the new forum system, but a specific and repeatable bug in the code. But, the problem is being caused by the infinitely scrolling forum “page” and the lack of actual pages. Try it on a nice long thread like the “like and get likes” thread, it really “improves” the reading experience.
As a general complaint, the infinite scrolling sucks.
Edit: Firefox 55 / Windows 8.1