Sounds crazy but I believe it considering how many damn commercials and time in between plays. But WSJ and many studies have shown there's only 11-12 minutes of actual play on the field during an NFL broadcast.
replays and commercials don't affect the amount of actual game time, because they happen when the clock isn't running.
But that doesn't affect the play. It's not as if the teams wait to start next play while replay is going on.Replays can and do occur while clock is running, while teams are setting up for next play.