The video shows a large whale swimming in the ocean. The whale is accompanied by a person who is swimming alongside it. The water is clear and blue, and the whale is moving slowly through the water. The person appears to be observing the whale and is keeping a safe distance. The whale's size is impressive, and its movements are graceful and slow. The person is wearing a wetsuit and flippers, indicating that they are likely a professional diver or marine biologist. The video captures the beauty and majesty of the whale in its natural habitat.