The video showcases an animated underwater scene with a green submarine moving through the water. The submarine is round with a large circular window on the front, and it has a propeller on the back. Inside the submarine, there are two characters, one wearing a blue hat and the other wearing a white hat. The submarine is surrounded by various sea creatures, including fish and starfish, and it passes by coral reefs and rocks. The water is a clear blue, and bubbles are visible throughout the scene.