In the video, a person is seen holding a black gun. The person's hand is visible, and they are using their thumb to push down on a lever on the side of the gun. The gun appears to be a semi-automatic pistol, and the person is demonstrating how to release the magazine. The magazine is a removable part of the gun that holds the bullets. The person's thumb pushes down on the lever, which releases the magazine from the gun. The magazine falls out of the gun, and the person then picks it up and reloads it. The video is a close-up shot of the gun and the person's hand, and the background is not visible.