What Windows Processes does RC (Jitsi) video calling use

On Windows when trying to do video conferencing it will just be a grey screen. I believe this is because of my firewall and the way I have Windows locked down.

I was wondering if someone could tell me how RC uses Jitsi on the desktop client. I noticed that Windows System is trying to access my DNS server, but I cannot unblock the system process.

So I am hoping there is a specific process that is being used.