Apparently the bat cape has a built in function for watching videos in private
/r/BatmanArkham: "I am Vengeance, I am the Night, I am Batman!" - This subreddit is dedicated to the discussion of all Batman Arkham Lore. Including the Rocksteady Trilogy, Arkham Origins and all tie-in games and comics. - September 24, 2021 - 12:55