The video shows a first-person view of a video game where the player is holding a gun and moving up a staircase. The environment appears to be a dark and grimy building with wooden stairs and metal railings. The player's gun is visible in the lower right corner of the screen, and there are game controls overlaid on the screen. The player moves up the stairs, turns a corner, and enters a room with a door. The room is dimly lit, and the door is closed. The player then moves back down the stairs and turns around to face the staircase.