In the video, a person is holding a small black device with a clear plastic cover. The person is using their thumb to press a button on the device, which causes a red light to turn on. The device appears to be a small camera or recording device, and the person is demonstrating how to use it. The person's hand is steady, and the button press is deliberate and clear. The red light is bright and easily visible against the black background of the device. The clear plastic cover allows for a view of the device's interior, which includes several small components. The person's thumb is the only part of their body that is visible in the video.