Found footage is the highest-returning bet in Hollywood history. Paranormal Activity cost $15,000 and grossed $193 million, a 433,000% return. Blair Witch cost $60,000 and made $248 million. The genre also has one structural flaw, and it took 25 years to fix it. Every found footage movie eventually collides with the same question. The demon is in the room, the walls are bleeding, and some guy is still holding the camera steady. The second the audience asks why anyone is filming this, the…