In the video, a person is seen using a rock to smooth out a surface. The person is using the rock to rub the surface in a circular motion, creating a smooth and even texture. The rock is gray and appears to be made of a hard material, possibly granite or limestone. The surface being smoothed out is a flat, horizontal plane, and the person's hand is visible as they hold the rock and move it across the surface. The person's movements are deliberate and controlled, suggesting that they are experienced in this task. The video does not provide any additional context or information about the location or purpose of the activity.