The video shows a close-up of a person's hand holding a Samsung smartphone. The phone is placed on a wooden surface, and the person is using their thumb to press the power button on the side of the phone. As the button is pressed, a colorful light is emitted from the bottom edge of the phone, changing colors from green to blue to red. The video is shot in a well-lit room, and the focus is on the phone and the person's hand.