The video shows a close-up of a hippopotamus's face as it opens its mouth wide to reveal its teeth. The hippopotamus is standing in front of a body of water, and the sun is shining brightly. The hippopotamus's skin is a dark gray color, and its teeth are white and sharp. The hippopotamus's mouth is wide open, and its tongue is visible. The video is shot in slow motion, allowing viewers to see the details of the hippopotamus's mouth and teeth.