Have you ever wondered why the only thing you've ever seen from inside a Supreme Court deliberation were courtroom drawings? That's because it's illegal to film or tape inside the chamber while the Supreme Court is in session.
They clandestinely filmed bits of an oral argument while the court argued McCutcheon v Federal Election Commission about limits to campaign contributions for corporations. The video was taken on October 8, 2013.
The video ends with a spectator yelling loudly about the Citizens United decision before both are removed from the chamber.