Nextcloud Talk doesn't record conferences in the browser but server-side: a dedicated recording server joins the call invisibly and captures video and audio of whoever is speaking — screen shares included. That's exactly the server we run for you, in Germany.
The finished recording is uploaded to your Nextcloud as a video file, into the Talk/Recordings folder. After that, nothing stays with us — the file is yours, lives with you and follows your sharing rules.
The prerequisite is a Talk HPB — ours for €10/month or your own. The recording backend is connected the same way as the HPB: enter server address and shared secret in the Talk settings. That works with any Nextcloud — hosted by us, by another provider, or on your own server.