This is the public test version of the new call system that you can try without an account https://call.element.io/

Its pretty new and still evolving, but this is basically just embedded in Element if you start a call in the client. From my test just now it doesnt look like you can have two people screensharing at once :( The screensharing itself works fine tho, it looks like a new share by a different person will just overwrite the previously started one.

That's a somewhat weird, to me, use case. Even in a business setting, we share our screens with colleagues via meet or slack only one or two at a time. How does this work on Discord and why would a party of people do it?