I wired up my Christmas village and trains to the be controlled by the internet to help spread that holiday cheer. ChristmasVillage.io

I use a total of 3 raspberry pi's:
Main Camera - Pi3 with HQ Camera sensor & wide angle lens
Train Camera - Pi Zero W with v2 camera
Relay Controller - Pi 2 with 8 channel relay
Lastly I use my linux desktop to run a local RTMP server to collect the video streams and broadcast using OBS to YouTube.
The website is a simple vue.js component that sends user input to a queue to be processed by the Pi Relay Controller.