I actually made a fully functional Zoom (excluding exact mic transmission), but I cannot put it on Scratch's website because of, well, rules, but you can see the educational, non-online version here.
If you want to see how the online chat would work, just see inside! This was made by me with some pictures from Zoom. Obviously, not everything is exactly the same; this is just a replica for fun. Also, everything in this one is offline, unless I forgot to remove something (which I don't think I did).
