In the video, a person is holding a black smartphone in their hand and using their thumb to press the volume buttons on the side of the phone. The person's thumb is visible in the frame, and the phone is held in such a way that the volume buttons are easily accessible. The video is shot in a close-up view, focusing on the person's thumb and the volume buttons. The phone appears to be a modern smartphone with a sleek design, and the buttons are located on the right side of the phone. The person's thumb presses the buttons several times, indicating that they are testing the responsiveness of the volume buttons. The video does not show any other part of the phone or the person's body, and there is no background noise or music in the video.