This is a project I've wanted to do for a long time and finally found some time. Calin Crisan's motioneyeos is a complete Linux distribution that turns SBCs like the Raspberry Pi Zero into complete web cams. *AND* it's extensible.
The Pi Platter's USB UPS functionality is perfect for making a webcam that has built-in battery backup. Pan/Tilt servos and an on-screen power status display can easily be added by including the talkpp utility program and five simple bash scripts in a motioneyeos system.
Complete instructions can be found on the github if anyone wants to make their own.