In the video, a person is seen using a wrench to tighten a bolt on a sink. The person's hand is visible, and they are turning the wrench clockwise to tighten the bolt. The sink appears to be made of stainless steel, and the countertop is made of wood. The person's hand is steady, and they seem to be experienced in using the wrench. The lighting in the room is bright, and the focus is on the person's hand and the sink.