The video shows a close-up of a dog's mouth as it opens wide and barks. The dog's teeth are visible, and its tongue is pink. The dog's fur is brown and black, and it appears to be a medium-sized breed. The background is white, and there is a blue text box with the words "#4 SUDDEN AGGRESSION" in white letters. The video is shot from a low angle, focusing on the dog's face and mouth.