Doc,
I enjoyed watching your Monastery video sample. Good work! I assume that what you posted was more or less a "proof of concept" to get the idea across of what you had in mind. As such, I think it worked well. You've got a great idea, and it looks like you're taking the right steps to get it done.
Some suggestions:
1) get the camera closer to the action. Zooming in from such a distance loses the sense of depth and consequently loses the drama inherent in your frolicking in the waves. It appeared that the camera could have been much closer to the waterline without being in danger of getting wet.
2) a second camera in the waves would have been good. It wouldn't necessarily have to have been synchronized with your actual experience, but just similar. It could have been after or before and provided some great b-roll for the in-water part of the video. Actually it's not too late for someone to go in an get that footage.
3) good audio. After exiting the water and approaching the camera, the voice was clear yet the wave sounds were strong -- a good combination. The framing of the image of you in front of the waves was good too. Good for establishing and reminding the viewer what this is all about. Although cutting between that and a close-up would have been better.
4) I thought having the guy helping you with your gear, and talking to him about taking your tank off, etc. was a good touch -- it made it less formal and easier for me as a mere mortal to identify with.
5) When you were talking to the camera after the dive, it would have been much more interesting to intercut you with scenes of what you were talking about. E.g. when talking about having the reg in your mouth, show a close-up of you with your reg in -- a shot in the water would be even better. You can still get that shot and cut it in with your existing footage. When talking about rolling, replay the rolling sequence. Show white water when talking about it, etc.
All in all, it looks like a great start! If you want any other comments as you proceed, I'll be happy to chime in. Let me know when you've got it done, and if it's not too long I'll put it into my TV series!