Hello @ScottishFreedom,
If you want to try to setup a TURN server yourself, you may have a look at TTRSS install Problem and Matrix Synapse Server Problem where I documented some of my late experiences on setting up coturn.
I even use it for a Nextcloud instance on some other network and it seems to work well.
I even tried to setup the jitsi-video-bridge for the ejabberd on my FB but ran into some other port forwarding and similar annoying problems again. So I decided to give it up for the while. At least to not mess up my working servers on my odroidxu4.
If you don’t have an xmpp server running on your box you could give a complete jitsiMeet installation a try.
But remember that you will definitely have to open the necessary ports in firewalld before that will work. And I guess you will need the TURN server for it also.