In the video, a person is seen holding a knife in their hand. The knife has a black handle and a silver blade. The person is using their thumb to push down on a button on the handle of the knife, which causes the blade to extend outwards. The person then releases the button, and the blade retracts back into the handle. The person repeats this action several times, extending and retracting the blade with their thumb. The background is a black surface with small holes in it.