This is actually kind of neat. It’s a director’s commentary much like the kind you will find on a DVD or Blu-Ray. This is something Rian Johnson has done before.
He does explain a few things about using proper headphones or earbuds so that people don’t disturb those around them, and about hitting play/pause without having a bright glowing screen out. He even says “drive safely to the theater.” Considerate guy he is.
So if that’s your thing. Check your local showtimes for the Looper and enjoy the commentary.
Here’s the commentary track’s link: Looper Theatrical Commentary Track