Webcam snapshots - if any webcamera is available, snapshots are taken from it.
If web-cam shanpshots are ebnabled and the interval is set to 0, they will be taken only at the login/logout moments
Make snapshot from all webcams - take snapshots from all available webcams. If this option is disabled, snapshots are made from the default camera.
Enabling this module unmasks the agent as usually an indicator near to the webcam lights on at the moment of taking a picture, which cannot be disabled by using software means.