There is a longer version that shows the inside of the plane. The flight attendant decisively and composedly ushering the passengers off the (upside down) plane. Hats off.
People just having been in a crash, however, are in a different situation. They've just been thrown upside down, having to release their seat buckles and fall down onto the roof, then being ushered out in panic. Them not behaving perfectly rational should be excused.
If you want something to happen in an emergency, you either drill it to be instinct, or it won't happen reliably.