The video shows a person in a wetsuit swimming underwater with a large animal, which appears to be a hippopotamus. The person is holding onto the animal's back, and they are both swimming in a body of water that is green in color. The person is wearing red flippers and is swimming alongside the animal, which is moving slowly through the water. The person appears to be leading the animal, and they are both moving in the same direction. The water is clear, and the bottom of the water body is visible, showing some rocks and plants. The lighting in the video is natural, and the overall atmosphere is calm and serene.