The video may have some parts that are slightly more on the left part of the screen and soma parts that are slightly more on the right side of the screen. If you don't look to the correct side, the system may send a small electroshock, make the video longer repeating the important parts until you pay attention, select a longer version of the video where the repetition is not obvious but they keep saying the same thing again or again, or let the system randomly select you for a voluntary group for a new training video tomorrow.