This video is a screen recording of a first-person shooter game. The player is moving through a series of rooms and corridors, shooting at enemies. The game's HUD is visible, showing the player's health, ammo, and other game-related information. The rooms and corridors are dimly lit, with a mix of natural and artificial lighting. The player's gun is visible in the lower right corner of the screen, and the enemies are shot and eliminated as the player moves through the game environment.