In the video, a person is holding a smartphone in their hand and shining a light on the screen. The light is causing the screen to flicker and create a pattern of light and dark. The person is moving the phone around to create different patterns on the screen. The light source is not visible in the video, but it is clear that the light is being shone directly onto the screen of the phone. The person's hand is steady, and they seem to be controlling the light source to create the patterns. The phone appears to be a modern smartphone with a large screen. The video does not contain any audio.