Privacy Respecting Ring Doorbell Equivalent?

I couldn't find a post in this community about cameras so I figured I'd make one. Requirements:

• No "sign up" required to record video
• Video is stored locally
• Video is in a non-propriatary format
• Can work offline

Optional/Discussion Points:

• Can wireless connectivity be hardware disabled
• Can auto-update be disabled
• Does the device try to "phone home" if it is connected to wifi
• Disk encryption would be nice but I doubt that'll be an option for anything other than self-hosted stuff

Does anyone know about Lorex (it seems more privacy centered)?

I'm highly technical, so feel free to mention self hosted raspberry pi soltuions as well.