Get your hands on an underwater video system and try it. You could take a course or rent a system while on holiday. You'll find that it is extraordinarily easy to make acceptable underwater videos. We recommend that divers interested in imaging should start with water. There is far less frustration and the procedure is much easier to master. Most new videographers have less detrimental impact on the reef than most new underwater photographers.
Should you take photos or shoot video of your dive trip? This site
guides you through not only the mechanics of underwater videography, but
how to tell the unique story of your diving adventure.