In the video, a man is seen adjusting a harness on a dog. The man is using a black strap to secure the harness around the dog's body. He is seen pulling the strap tight and then using a silver buckle to fasten it in place. The man's hands are visible as he works on the harness, and the dog's fur is visible in the background. The video focuses on the man's hands and the harness, showing the process of securing the harness on the dog.