This tutorial was tested on Ubuntu Server 18.04

Jitsi an awesome opensource solution for video conferencing. compatible in most web browsers, so end-users can start a web-meeting

in a couple of clicks. This post assumes you have already installed Ubuntu server 18.04

First install the Jitsi repository key onto your system:
wget -qO -  https://download.jitsi.org/jitsi-key.gpg.key  | sudo apt-key add -
Create a sources.list.d file with the repository:
sudo sh -c "echo 'deb  https://download.jitsi.org  stable/' > /etc/apt/sources.list.d/jitsi-stable.list"
Update your package list:
sudo apt-get -y update
Install the full suite:
sudo apt-get -y install jitsi-meet
or only the packages you need like for example:
sudo apt-get -y install jitsi-videobridge
sudo apt-get -y install jicofo
sudo apt-get -y install jigasi

Let's Encrypt:

cd /usr/share/jitsi-meet/scripts/
./install-letsencrypt-cert.sh
The script should just ask you for a valid email address.
Follow the instructions and it ‘just works’.
/etc/init.d/jitsi-videobridge start

Or use this:

/usr/share/jitsi-meet/scripts/install-letsencrypt-cert.sh

Read More About Jitsi

Here's a link to a great guide with pictures:

Installation Details