We dive with a GO Pro Hero 3 black. It's a great camera. We use a SeaLife AquaPod pole mount which gives us single handed use and an extendable pole. Use a carabiner to attach it to your BCD so you won't lose it or drop it. It doesn't have a light/strobe attachment but where we mostly dive (Cayman Islands) you don't really need it. We use a red filter that we purchased at Cathy Church in Cayman Islands. Maybe you can find them at AquaSport Scuba or Dive Shop (I seem to recall Dive Shop on Macleod sold the Go Pro accessories). Don't buy the "dome" red filter as it left a slight round reflection on our vids taken in higher light (shallower). Use a flat red filter. I also think that Caribbean Dreams dive shop on 16 avenue was going to get in a line of go pro accessories, check with them, they have awesome customer service.
The videos are mostly done by my 14 year old son. They are great quality vids. My son used to dive with an Olympus Pen in a dive housing with double strobes on a tray. I hated him not having his hands free, so I love the AquaPod. He keeps asking for a tray and strobes for the Go Pro
Also, we travel with our macbook. When we load the vids they are too high quality for the iphoto app to play without stalling. We drag them onto our desktop and play with VLC Media player...no troubles at all
Happy diving! Here fishy fishy