Linux Babe published a tutorial about installing Jitsi Meet on Ubuntu 18.04.
Install Jitsi Meet on Ubuntu 18.04 - Self-Hosted Video Conferencing
This tutorial is going to show you how to install Jitsi Meet on Ubuntu 18.04 server. Jitsi Meet is a free open-source video conferencing software that works on Linux, macOS, Windows, iOS and Android. If you don't trust Zoom.
Install Jitsi Meet on Ubuntu 18.04 - Self-Hosted Video Conferencing