The video shows a close-up of a person's hand using a computer mouse. The person's thumb is seen pressing down on the scroll wheel of the mouse, causing it to move up and down. The mouse appears to be a standard two-button model with a black color. The person's hand is steady, and the movement of the scroll wheel is smooth and controlled. The video is shot in a well-lit room, and the focus is solely on the hand and the mouse.