I've been searching for a wireless (i.e. it has an internal battery) video doorbell which has the ability to save recordings onto a local server. All the ones I could find seem to only offer cloud storage (which I don't want to use due to privacy concerns, and also that if the company were to disappear, then so would the functionality of my doorbell).
The battery feature I consider secondary, so if anyone could find a video doorbell which can save its video feed locally I would be interested. I essentially want to use the doorbell as an intercom and as CCTV which I will save to my server and then delete on a rolling basis over a certain number of hours. I'm also open to more creative solutions to this goal if anyone has one.