The birds are more than likely out of the Navy test facility at Patuxent River, though they have the Wasp's (test squadron?) stenciled on their tails. There was a write up in Marines Mag interviewing Marine Major Rusnok, one of the pilots of the two birds filmed. The Wasp is a LHD (LHD-1) and part of the hardly heralded Amphibs, so, while it can steam faster than most of it's gator brethren, top speed is 23 knots, so no speed demon. After watching the video again, I have to agree with kz11gr about the exhaust. The yellow shirt almost got knocked in the drink on the first STOL and you see he learned his lesson the second time around when he hunkered down kissing the deck. Cheers, Bruce.