The video shows a person swimming in a pool with a device attached to their feet. The device appears to be a training aid, possibly used for improving swimming technique. The person is seen swimming in a straight line, with the device providing resistance and guidance. The water is clear, and the pool is well-lit, allowing for a good view of the swimmer's movements. The swimmer is wearing a swim cap and goggles, and the device is attached securely to their feet. The swimmer's movements are smooth and controlled, indicating that they are experienced and comfortable with the device.