The video shows a group of people swimming in the ocean with dolphins. The dolphins are swimming around the people, and the people are wearing snorkeling gear. The water is clear and blue, and the dolphins are grey with white underbellies. The people are wearing yellow fins and are swimming in a line. The dolphins are swimming in front of the people, and the people are following them. The video is shot from an underwater perspective, and the dolphins are the main focus of the video.