Thought I'd drop into this thread, wish I had found it a few weeks ago as excellent advice and experience!
I put together my first video with a GoPro Hero3 Black. White balance on auto, ProTune on, 1080p, 30fps, with one of the cheapie eBay style drop in filters. I had experimented a little with it snorkelling and so thought I'd try the filter a little deeper. I didn't apply any post-processing.
The dive is on the SS Stavronikita in Barbados, deepest point is ~130ft. The camera was fine, a little warm when finished. Of more concern was that the battery was just about dead (no bars) after the 50mins, the wireless was on though as I forgot to switch it off after checking the alignment of the camera (iPhone app).
I used the headmount, which, with hindsight either requires a different method of diving (ie. don't look around/jerk your head so quickly!) or I should use a different mount. I think perhaps a chinstrap or tether would be wise as I found the headmount simply sitting on my head having come loose at one point during the dive! I would also prefer to undertake one of the genius mounts seen in the mount thread on here of fixing it to my mask (as it would take the setup/align time out of the pre-dive checks) but my Atomics don't seem to lend themselves well to that route...will have to try again.
So this could really be thought of as an 'out of the box' video. Anyhows, enough preamble, here is the video :-
Underwater art exhibition on the SS Stavronikita - Barbados (with video) | Barbados Property & Vacation Blog | vacation, underwater, diving | at Barbados Property Search
In future, I'll be trying the raw footage option and then some colour correction in Sony Vegas (once I get my head round that), less head movement, a tether and by the looks of things trying one of the SRP red filters.
Looking forward to the 'howto' guide though!