I would have to say that, Air New Zealand Safety Videos appear to be more interested & designed to promote how good Air New Zealand is, this rather & at the expense of just setting out all the need to know safety aspects of the aircraft. The airline should use a simple, basic video, showing only the need to know aspects of all the safety requirements.
Also, make it absolutely clear to all passengers, if an emergency evacuation is called, any person reaching up for their cabin baggage, will moved out of the way rather boldly!