And I would not fly with this pilot.
There is an approved instrument approach to Queenstown and the approach plates/procedure are readily downloadable from the web.
There is also a visual approach.
What the pilot in the clip has done is fly the visual approach with a small, but nonetheless important segment, flown in instrument conditions.
Rock filled clouds are like unloaded guns that kill people, they are entirely unexpected. There are rules for flying in Instrument conditions and the pilot in the clip breaks most of the important ones.
In fact, not only would I not fly with him (or her) I'd like to see their licence lifted before they kill people.