I’ve been looking for something like this as well. I’ve not bought the hardware yet, but I’m planning to track down a “dumb” IP camera and use an RPi to host a DVR software. Anything that allows you to record to anything but a home server is a service I can’t trust. Right now, the problem seems to be tracking down the camera itself. There’s tons of ~$20 cameras I’m finding but it’s hard to tell which ones phone home to the internet and which ones are local only.
This sounds interesting, but fuck off with this nonsense. There is nothing “locked down” in SteamOS.