I am not the one who posted the video, but I have a Kodak Playsport. I never thought to use it on Pelican Plunge, but will in a couple of months!
I love that with that waterproof camera/video recorder, once I download the videos, I can "snap" a still photo to save as well. I found it was best to use it on video mode when snorkeling and then I could "snap" the photos that came out best once we got home.
I also used it when we did the dolphin swim in Grand Cayman. Got some great shots of the family with the dolphins that way.
On a side note - it's a decent swim out to Pelican Plunge. The water was pretty chilly last time we were there (December 2010) and it was chilly while waiting for the slide, but definitely worth it!