The video shows a large pile of gravel in a tunnel. The gravel is gray and appears to be crushed. The tunnel is made of concrete and has a curved ceiling. There is a conveyor belt in the tunnel that is moving the gravel. The belt is yellow and has a black railing on the side. There is a person standing on the belt, wearing a yellow hard hat and a high-visibility vest. The person is holding onto the railing and appears to be overseeing the movement of the gravel.