Jitsi Meet is a wonderful open source video conferencing platform. Most things can be tweaked and configure to your needs.
If it’s important to you, that Jitsi Meet does not make external requests to third-party services like Gravatar, etc, you can change your xxx-config.js file in /etc/jitsi/meet like so:
disableThirdPartyRequests: true,
Credits: www.kuketz-blog.de/jitsi-meet-externe-verbindung-zu-gravatar-com/