The video shows a person wearing a snorkel mask and a snorkel tube swimming underwater. The person is wearing a black swimsuit and is seen from the back. The water is clear and blue, and the sandy bottom of the sea is visible. A sea turtle is swimming near the person, and the person is moving slowly to avoid disturbing the turtle. The turtle has a brown shell with patterns and is swimming gracefully. The person seems to be enjoying the experience of swimming with the turtle.