It's Queenstown NZ FFS.
Not like nobody has ever shot a movie in that region using a helicopter.
I recognise a few faces in the clip. There is a wealth of experience and "advice" available.
When it comes to aerial filming equipment that is the home of the Shotover camera developed by John Coyle who also developed the Cineflex.
Of course you can't do a movie in that area without including Sutherland Falls!
As for the "spiral descent" - no big deal if done properly. I have seen guys in a H500 do it and actually climb in that attitude. You have to be
light though.
I like Toms headset - maybe it got in the way of face time.