The problem is you have to setup the doorbell first to enable the RTSP stream and then parse that into your NVR/NVR platform of choice. Whether that changes with the new (currently in Early Access) G4 Pro that was just announced I don't know BUT with the original G4 doorbell here, the requirement still seems to be on using the UNVR/UDMP/CloudKey Gen 2 etc with Protect to setup then enable the stream and pick that stream up as you wish elsewhere.Juts re-read this.
Can't you use the Unfi in Standalone mode with eg a blue iris server?
I'm sure I read this somewhere recently.