In the video, a man is seen holding a horse's mouth open while another person is brushing the horse's teeth. The man is wearing a blue shirt and a cap, and the horse is white with a purple bridle. The person brushing the horse's teeth is wearing a black shirt. The background is a fenced area with trees and a building. The man is holding the horse's mouth open with his left hand while the other person is using a green toothbrush to brush the horse's teeth. The horse seems calm and cooperative during the process.