[Malte Müller]

I also would try to chime in (not sure if any one really wants to hear me speak English ;)). I have used Zoom, GoTo, Google Meet (also has a 60 min limit) and indeed Teams which was the only one I had some problems (no video or audio) with though. I don’t have any even free account for any of these myself. As far as I know there is no free unlimted solution.

Signal also has group video calls but I neither have used those nor found if there are time limits.

Or is everyone here Linux user?

No, Mac user here 😉 (Although that has a Unix core ;-))