A vibrant cartoon with colours and smooth animation. Create a 2-minute realistic cinematic horror video for a US YouTube audience. Show Jake, a young American man, alone in a dark apartment at 2:13 AM. He hears three knocks at the front door. He checks the peephole, but nobody is there. He opens the door and finds a note saying, "DON'T OPEN THE DOOR AGAIN." Jake closes and locks the door. His phone receives a message: "You shouldn't have opened it." Another message says, "I'm standing behind you." Jake turns around, but nobody is there. Then he hears creepy breathing coming from his bedroom. Jake runs toward the front door, but three knocks come from inside the bedroom. His phone shows: "DO NOT LET IT OUT." The bedroom door handle slowly turns. A mysterious voice whispers, "Jake... you forgot to lock me in." The lights suddenly go out. Show a completely dark screen. The next morning, Jake is gone and the apartment is empty. End with three loud knocks coming from the locked bedroom. Use realistic American horror-movie visuals, dark lighting, suspenseful camera movements, creepy shadows, realistic sound effects, deep male English narration, English subtitles, and scary background music. Keep Jake and the apartment consistent in every scene. End with a black screen and: "KNOCK... KNOCK... KNOCK."