The video shows a cartoon animation of a pink submarine with two characters inside, a boy and a girl, who are exploring the ocean floor. The submarine is surrounded by colorful coral and sea plants. The boy and girl are wearing scuba gear and are seen looking out of the submarine's window. The ocean floor is covered in various types of coral and sea plants, including purple, red, and green ones. The water is clear and blue, and the light from the surface is shining through. The submarine moves slowly, allowing the characters to observe their surroundings.