No I havent, but thats just a few clicks to activate. People on chat are more old school IRC members so voice is not a priority. But it does work without problem.
There are 2 platform for voice and video. One is rocket.chat own platform, still in development and the other is Jitsi. Also it support public accessible Jitsi or a private Jitsi platform.
UPDATE: I have activated video chat for direct messages on my server. Works great from mobile as well as desktop apps. It supports screen sharing and session recording as well.
Hello, do you know, how to add selfhosted Jitsi to synology chat (like embaded /jitsi)?