I am wondering why I haven’t found GNU Jami messenging and conferencing (developed by savoirfairelinux) even mentioned in the forum.
It has clients for all major platforms.
Even has an LDAP capable organizational client configuration management-server package, see: https://jami.biz/jams-user-guide
Looks like this is a solution that is precisely made for self-hosting.
Jami is mostly peer-to-peer (“Swarms” are coming also) so using our yunohost server “coturn” for peer discovery and notification could be doable. It’s beyond my skills though, but Jami is a great app/service that in my experience lacked good notification in systems without google services.
Once connection was made it works superb for both video and chat.
People seem to use Galene. Coturn/stun doesn’t seem to work ‘out of the box’ (Nextcloud and XMPP)
I have given up on this feature for now and just use Signal app for 1-to-1 video chat. Signal can now do 8 person group chat as well.