I hate to be a spoil sport here....but there is much flatter ground shown in the beginning of the video.
In a real rescue....would it not make far more sense to package the victim....and move him a few hundred meters to a spot nearby that would afford a much less demanding landing and perhaps prevent the need for any winching at all.
If the extreme landing practice was desired....why not do it with no one but the crew aboard?
I mean what could possibly go wrong?
For Example: