The video shows a person swimming in the ocean while holding onto a device. The person is wearing a swimsuit and a snorkel mask. The device appears to be a type of propeller or wing that the person is using to glide through the water. The water is a deep blue color, and there are no other people or objects visible in the video. The person seems to be moving at a steady pace, and the device is helping them to move through the water with ease.