The video shows a first-person view of a person holding a gun and walking through a dark and dirty building. The person enters a room where they encounter a zombie and shoot it. The person then continues to walk through the building, encountering more zombies and shooting them. The environment is dark and gritty, with debris and rubble scattered throughout the building. The person's gun is visible in the bottom right corner of the screen, and the zombies are seen approaching and attacking the person.