The video shows a person in a wetsuit swimming underwater with a whale shark. The person is wearing a black wetsuit and is seen swimming near the whale shark, which is a large fish with a white underbelly and spots on its back. The water is clear and blue, and the person is seen swimming in different positions, sometimes close to the whale shark and sometimes further away. The whale shark is seen swimming calmly in the water, and the person appears to be enjoying the experience of swimming with such a large fish.