What to do:
Put some black electrical tape over the camera on your computer notebook/laptop/tablet/mobile phone.
Why do it?
There have been cases where malware on a computer gave an attacker access to the camera, and compromising pictures of the user have been remotely taken.
I currently have tape over my notebook computer and tablet device, but not my phone.
Sure you could buy a fancy one, but tape will do. Just remove for any video conferencing calls you have to make or selfies you have to take, then replace it.