Matt's 4K Apple TV runs for an hour and then shuts down. Leo says that it's possible that the TV is overheating and it shuts down as a protective measure. So Matt should make sure there's plenty of airflow. He can also use canned air to blow out any dust accumulation. There could also be a memory leak that's causing it to crash. Leo really recommends making a Genius Bar appointment at the Apple store to tell them it's overheating after an hour. Since it's still under warranty, they could just give him another one.