It would be a bit of work, but if their repo is solid you could just modify that hardcoded value and build the docker image locally.

Edit: Just realized they may not have a public repo. If that's the case, then sounds like a way to try to get people to pay for the service.

10MB seems like a vestige of old code. What used to be reasonable no longer is. Cameras have too many pixels now for that low of a limit.

Doesn’t text chat still have a weird thing where you can’t see the texts unless you’re in a voice call in that channel?

Maybe a good opportunity to reduce screensharing (unless pure video content). A lot of people are sharing webpages through video. That's subpar (except for the shared pointer)