The video shows a cartoon submarine with three characters inside, exploring the ocean floor. The submarine is teal in color with yellow and black eyes. The characters are wearing scuba gear and are seen looking out of the submarine's porthole. The ocean floor is covered in sand and has various sea plants and coral. The video also shows a large pink jellyfish with a smiling face and purple tentacles. The jellyfish is floating in the water and appears to be interacting with the submarine and its passengers.