This project will be divided into two phases.
Phase 1 will encompass the basics of the project, or a minimum viable product. It will consist of a usb powered 'on air' light with an ESP8266 and basic code running in python which will detect when the camera is on or off. It will use a power supply.
Phase 2 will add fully wireless connectivity via the ESP8266 and wifi networking, by adding a battery pack that powers the lamp.
I am writing my own Video-conferencing tool right now. And I want to implement something like On-Air lamp. Will control it using gpio command-line or such. Need to think about it.