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.