I have to bring up the unpopular discord page.
It quickly became unpopular, because it is not suited for forum use. But om Discord you cant have have sound chat rooms. Like a Zoom meeting, but nobody needs to host the meeting. You just join or leave as you please. I dont think that feature was set up on the UU server, but it could be.
I dont know how sound compares to Zoom, Teams etc, or how many people can stream video at the same time, but it might work.
Obviously Discord could never replace the forum, but it could be where the streaming happened.