I personally had the video feed (hosted on video.ibm.com) get blocked by Microsoft Edge's tracking prevention, so if you have that feature on, or an adblocker with that feature on in your browser of choice, that could be the issue. The video feed isn't running right now anyway.
The fact that there are teachers out there who will sometimes just refuse to allow kids to go to the bathroom is just insane. What good does treating students like that actually bring?