LonTV is a YouTube channel. I often find he talks about things I'm interested in. He doesn't focus on Linux but he does install it to test systems once in a while. In the 2020 April 6 episode he talks about Jitsi and then about Zoom security issues. <https://www.youtube.com/watch?v=gRaTFDMk67g> This reflect's Lon's change of thinking since this 2020 March 30 episode. <https://www.youtube.com/watch?v=MqWamqiaF00> If you are going to watch both, I suppose that it would be best watching them in cronological order. (I'm only now watching the earlier one.) I had not bothered to read up on Jitsi (or Zoom). I learned from Lon that a hosted Jitsi is available with no charge. Of course that might have security problems. Hosting Jitsi on one's own system would reduce those concerns (but not eliminate them).