Drinking from a firehose

I don't know what causes my frequent problem with zoom. I can get sound but I tend to see only one or two people in the gallery view and far too often the person on the main screen is frozen. I was lucky I could see the speaker on the Knitting Guild's zoom or it wouldn't have been nearly as fun. One thing tickled my funny bone on the SEMGS zoom though, I could see four thumbnails across the zoom window, but I was the only person visible on screen.