A script that disables/enables the camera.
What do you mean by “disable”? 
Someone made a script for disabling the microphone and enabling it with a toggle button. I wondered if someone had it done for camera aswell? In these covid-19 times i do a lot of zoom, skype and workplace meetings and it's quite nice to be able to mute and turn of the camera if needed.
You can toggle the menu bar item of the app you use 