https://fairmeeting.net offers free audio and video conferencing.
Recommended web browser: Chrome / Chromium.
Or use the Jitsi meet App for your smartphone.
If you encounter a problem or if you have a feature wish, please submit an issue here.
You find more documentation and FAQs at https://fairchat.eu
Code is in /usr/share/jitsi-meet/
Settings are in /etc/jitsi
service jicofo restart
service jitsi-videobridge restart