is that him on the rich walking out of frame in the first few seconds?
Don't think so.
Just watched it again to check something that has been bugging me.
First of all this was set up to fail. Listen to the audio.
"Looks like a big ones coming...here"
"here comes a big wash (excited?)"
then what sounds like laughing muffled by the sound of the waves
Obviously this was set up to fail.
Second key being the camera is not only shooting nothing but its also sitting about 1/2 a foot off of the ground. Kinda like if it was sitting on a gorilla pod or similar, hell even a bunch of piled up sand if you know your camera won't be coming out of this in one piece.
If it was on a tripod it would have toppled when the water hit it but instead it sat pretty still until the big waves hit.
Lastly the thing that doesn't feel right is the fact that salt water and electronics don't play well.
Sure the footage from the card would be recoverable to a degree, but still that would have gotten a hell of a beating if it was true, and surely more than a little damage to the card. Unless it was safely in a waterproof case, such as one of these...

If this was a hoax it was a well planned out one.
But if it was real why would B&H reward his obvious blatant stupidity?