The video shows a dog walking on a leash through a tunnel. The tunnel is dimly lit, and the dog is walking towards a bright light at the end of the tunnel. The dog appears to be a medium-sized breed with a black and white coat. The leash is held by a person who is not visible in the video. The tunnel walls are concrete, and there are some debris and litter scattered on the ground. The dog seems to be calm and walking at a steady pace.