The video shows a person swimming underwater with a large shark. The shark is swimming slowly and calmly, and the person seems to be in close proximity to it. The water is clear and blue, and the sunlight is shining through, creating a beautiful and serene atmosphere. The shark's skin is smooth and grey, with white spots on its back. The person is wearing a wetsuit and flippers, and appears to be filming the shark with a camera. The shark's fins are visible, and it moves gracefully through the water.