Full-screen videos don't work
From what I can tell, for oneboxed youtube videos that aren't right at the top of a thread, going to full-screen doesn't work at all. The video goes full-screen momentarily, then disappears and you get jelly potatoed a couple screens up. I first noticed it in this post in the Discopocalypse thread, so I tried it in Blakeyrat's video thread that I knew would had a bunch of videos:
@hungrier This happens to me as well.
Same thing with Chrome 49.0.2623.110 on Linux
This later one is broken.
Yup. I just ended up with the topic in full screen and I'd forgotten the Chrome OSX shortcut to exit full screen.
NodeBB: Reproducing Discourse bugs On Demand!
For some reason it seems that Chrome resizes the apparent viewport when going full screen, which causes jellypotato, which gets the video to unload.
I guess the infinite potato engine is a source for a lot of problems. Who knew?