Went to the basement (The Screening Room!), watched the first 5 minutes of Robot Wars, stop the video and wandered around to the other levels. I then returned to Robot Wars. I see the counter is at the point it was when I left. However, all I get on the screen is the White Dot (all hail) with black squares in the center rotating clockwise. The video never restarts. Currently viewing on Firefox.
What device are you using?
Has the issue cleared since your initial report?
If you are using a device accessing the site through wifi, there can be times when the wifi hiccups and causes issues.