What I wound up with is a RunCam 3S. I chose it because it is fully self contained with it’s own (replaceable) battery, microSD (64GB) card, and wi-fi capability that make viewing and controlling the camera on a smart phone.
Dimension: 40x38x37mm. Weight: 69g (with battery). Resolution: 1080p@60fps.
This is the link for the users manual: https://runcam.com/download/runcam3s
Price: $73.53 - £56.28
I don’t think it is waterproof, so it will require a sheltered installation.