Whilst not wishing to comment on the specific conditions being shown on the video, it does give a more than adequate demonstration of the difficulty in recovering a man overboard who has become exhausted.
"Be wary of strong drink. It can make you shoot at tax collectors - and miss."
Robert A Heinlein
He'd have an easier time of it if they handed him the end of a halyard. One can pretty well walk up a wall on a line, but the trick is at the top where the angles become all wrong. As they would figure out if it weren't for the Mojito Factor.