I know this has been discussed here before, but...
She seems to have a lot of forward cyclic in while just sitting there on the deck. The boat is pitching pretty good, and at the top of each pitch cycle, the helicopter is tending to nose over. Conversely, it does not tend to pitch backward at the bottom of the swells. The feeling of "falling over backward" is not comfortable for anyone, so she's probably compensating by holding in some forward cyclic. Suddenly it goes!
Undoubtedly she wasn't trying to lift off yet, as there were still men working around the ship, so it was unexpected/unintentional. She catches it, keeps it from hitting the structure of the boat, but in doing so whacks the tail rotor on the deck. Around it goes! But even as it comes to rest, you can see that she's *still* holding a substantial amount of forward cyclic!
In my career, I don't think I've ever seen a helicopter pilot who held the cyclic too far back on the ground. Most of us think "neutral" is some point forward of actual neutral. Weird.