The camera of the Interior the Truck reacts with this program on head movement, so that when driving no mouse or keyboard more do you need to change the view.
I once had a small hope finally understand instructions with video on how you can use them in ETS2.
Cam must be present.
It is a RAR file that you can open it with Winrar or any other compression utility. The file is so big because I have crammed in with the video, which is also required ets2.ini with the settings as I use it with a Logitech Webcam 270HD which is under my monitor at a distance of approx 1m.
Credits: FaceTrackNoIR, Icemann29