When digging through jitsis conf files I see these domains (examples):
Do I need to set a DNS A and/or AAAA record for all these domains?
Further I’ve found these domains:
Will I need to add these to /etc/hosts?
Nope, these are prosody xmpp virtual hosts internal to the system. The only thing that needs a DNS is the the virtualhost that is configured in nginx.
The webserver is the entry point for everything and is the only thing that needs a DNS.
If you are hosting everything on the same machine there is one case in which you may want a second DNS: Setting up TURN | Jitsi Meet