coincidentally, I fly North sea now, and my step father worked on the boats for the Dacon scoop trialling. He reckons the dummies had to have strengthened titanium joints to keep them together during the high sea state trials, and he also asked me were i ever to suffer a ditching, never to have to be recovered by dacon scoop if I survived said ditching, because it would be a shame that i was killed during rescue! Anything over about 4m sea state and it's not pretty.
and yes, that video does show a dummy during the recovery.