The video shows a person scuba diving underwater and swimming alongside a large whale. The person is wearing a scuba suit and has a camera attached to their head. The whale is swimming gracefully through the water, and the person is seen petting the whale's back. The water is clear, and the sunlight is shining through, creating a beautiful underwater scene. The person and the whale seem to be in harmony with each other, and the person appears to be in awe of the majestic creature.