Download the corresponding file (Video.zip) and the following video:
- gauche.avi (rename the file left.avi in gauche.avi)
- droite.avi (rename the file right.avi in droite.avi)

Once the file (video.zip) decompressed, you will obtain one executable file. Be sure, the two video files are in the same directory than the executable file before executing the programm.
To exit the programm at any time, just press "Escape".