Peter Debruge Chief Film CriticPlaywright Stephen Karam hasn’t just made a movie out of his Tony-winning play “The Humans”; he’s made an A24 movie, with all the idiosyncrasies and directorial self-indulgences that implies.Over the course of just eight years, A24 has established itself as a distributor for which out-there creative gambits aren’t merely permitted; they’re downright encouraged.