Libre software for video calls

I would like to add that I'm aware of the following site: https://www.fsf.org/campaigns/priority-projects/voicevideochat and that maybe my request is a bit too early as I haven't tried all the options listed there yet.

There is this thing called "riot-web" based on that matrix stuff in the parabola repositories. It does not seem to be in trisquel repositories for some reason. At least not by that name. But if it is in the Parabola ones it's libre.

I have used Jitsi through a web browser which is my preferred option. It doesn't even require you to make an account! This seems like the most convenient thing. You just create an old fashioned chatroom and then share the link with your family.

GNU Jami is very good.

Best,
Michael
What is GNU? Check out https://www.gnu.org/
GPG Key: 4337 2794 C8AD D5CA 8FCF FA6C D037 59DA B600 E3C0

Thank you very much for your help! We are now using both Jami and Jitsi Meet and both work quite well.

Hello again!
Over the last two weeks, both jami and jitsi have proven to be not as reliable as in the beginning. I feel dissatisfied because videos tend to freeze once every few minutes and sound quality is very variable (from excellent to barely understandable). This is true both for jami and jitsi.
How can I find out if I can change anything about it? The problems persist even using a LAN cable connection to the router so I subspect it has got something to do with bandwidth or the jami/jitsi servers.
Does anybody else encounter similar problems with jami/jitsi? Is a bandwidth of 10 Mb/s upstream sufficient for VoIP calls?
Thanks in advance!

I used jami a little bit over the last year. I had some earlier problems last year but it has been good for me recently. That said I was using it only for 1-1 voice calls (from Trisquel GNU/Linux) recently. I've had good video calls too. I don't know what is the required bandwidth but certainly such comms can be sensitive to wifi connection strength. Therefore you may wish to use a wired network connection or make sure you are not too far from your wifi antenna.

Has anyone experience of jami/jitsi with many users, with screensharing to show a Libre Office presentation? With the covid-19 lockdown I'm finding colleagues wanting to use video conferencing more so it would be good when free software solves it without destroying privacy/IT security.

I don't know about jitsi. I'll have to check that out sometime if its free software.

Video calls worked well for me when using a free Linphone account with Blink (the other party also used Blink but on Windows).

It depends on your use case. For private voice/ video calls between 2-3 users, Jami or Tox are P2P options. Wire can work for small groups too (Telegram has a nonfree server, and I'm told Signal can only do 1=1 voice/ video). For larger voice/ video meetings, I recommend Big Blue Button. But you'd either need to self-host your own instance, or find one that's available for public use.

The thing with any web-based conference service like Zoom, Jitsi Meet, or Big Blue Button, is that the conference can be entered by anyone who can get a copy of the conference URL. Sometimes these services can allow a password to be set for a conference, so a Bad Actor would need both the URL and password to spy on or disrupt it. But they're still more vulnerable than services like Wire that require users to authenticate before getting access to the system. Systems like Jami that don't depend on a server are (in theory) even less vulnerable to Bad Actors.