I considered this a few years ago, did the HSE scuba (part 4) which was huge fun
I'd recommend anyone doing it just for the experience, if a bit pricey
As far as getting work in the media business is concerned, I think it's very much a case of "who you know, not what you know", if you get my drift???
As appears to be the case with the media, it's only the stars that get paid well, everyone else seems to do it for expenses or in the hope that it'll lead to bigger & better things. Or in some cases, to get close to the stars!!!
Interestingly, I once had a conversation with a cameraman who said that he earned very little from underwater work & that most of his work came from corporate promo videos.
Cheers
Giles