Skype will shut down soon. I wanted an open source alternative so I tried Galene (https://galene.org/) multiple times to call my dad and it works very well.
For now, I spawn a disposable instance on OVHcloud using OpenTofu and the OpenStack provider. Then I configure the software using Ansible. The code is available here https://git.riou.xyz/jriou/galene-cloud.
Tomorrow, I would like to only host a TURN server on my VPS and self-host galene on my homelab.