This is a heart attack.

A first-person view shows a character holding a candle in a dark, brick-walled room, moving forward as the candlelight reveals the surroundings; a grotesque, pale-faced figure with dark hair suddenly lunges from the shadows, startling the character, who then drops the candle, plunging the scene into darkness. In the top-left corner, a small inset video shows a person in a green shirt reacting to the gameplay.