Well, it looks to me like the really good ones are a bunch of clips that have been edited and strung together with a desktop video editor. Add titling and/or music and your a video producer!
Also looks to me like the waterproof cameras like the GoPro 3 and the ATC2k are the least expensive of the lot, but work great.
Position and attach at least 2 cameras on your boat aiming for the best overall coverage of the tramp, trapped out and looking forward and/or behind the boat. Bring all the clips into the computer video editor and have fun making a movie.
That's about all there is to it. ;-)