Samsung Galaxy S4 eye tracking In the Samsung Galaxy S4 connection eye tracking video it shows a person watching a video. While watching the video if they turn their head the video will pause.

I want to ask, if the video is seen by two or more people what will happen to the video?
In S4, Eye movements are tracked by Front Camera. In this principle, the Persons Eye focused within the front cam is taken into consideration. (This doesnt works when there is no light or  dim light). This works well based on the viewing angle  (around 45Degree or something) of persons eye and Device front camera. This makes the possibility of detecting, one persons eye. so the play/pause depends on the single user not the multiple people. This makes sense when there is lot of crowd behind the user who is watching the video.