The video shows a person's arm moving back and forth over a computer case with blue and purple lights. The case has a black and silver exterior with a clear side panel. The person's arm is in focus, and the lights inside the case are blurred in the background. The lights appear to be LED lights, and they are moving in sync with the person's arm. The person's arm is moving in a steady, rhythmic motion, and the lights create a visually appealing effect.