Jitsi is a set of open-source projects that allows you to easily build and deploy secure videoconferencing solutions. We are best known for our Jitsi Meet video conferencing platform, meet.jit.si where we host a Jitsi Meet instance that the community can use for totally free video conferences , and the Jitsi Videobridge that powers all of our multi-party video capabilities.
There are many good reasons why you should use Jitsi over other video conference apps such as the most popular - Zoom. The reasons are explained in details in the video above.
What's more, if you run Drupal you can now integrate Jitsi service to access video conference directly from a Drupal site. You can create random or custom conference rooms or join existing conference. By default, the Jitsi meet server is used to establish connections, but you can specify your own server in settings.
Try out the development version - https://www.drupal.org/project/jitsi
Jitsi was acquired by 8x8 back in 2018.
Updated on 3 June 2020:
According to Zoom blog, Zoom will not encrypt your connection unless you have a paid subscription. This is more the reason why you should give Jitsi a try.
Please make also a Drupal 8 tutorial with groups and Jitsi? ;)