The video shows a person swimming underwater. The person is wearing a pair of flippers and is seen swimming in a straight line. The water is clear and blue, and the person is moving at a steady pace. The video captures the person from different angles, showcasing their swimming technique and the movement of their flippers. The person appears to be in good physical shape and is able to swim with ease. The video is shot from a close distance, allowing for a detailed view of the person's swimming technique.