"Shot during sex-filming"

This is technically very easy. Somebody load a Trojan on the computer and turn on the camera.

The camera is running without the human being noticing this in front of the computer.

Who watches sex movies can be filmed!

His other acivities can also be captured by the camera. It helps to cover the camera (lens) of the screen. Or to turn the external camera in a different direction.

Also think about the microphones!

See also : http://forum.mobbing.net/showthread.php/11749-filmed-watching-****-while-watching-sex-movies-and-then-blackmailed