Always wonder how you capture the underwater scenes. Do you have your GoPro on a stick? If so, how do you monitor the view? I think the wireless reception/transmission doesn't work under water.
go pro on a stick sort of, I just record what's happening and watch and edit at home then upload to RU-vid. And yes wifi and bluetooth don't work underwater
At 6.17 what is chasing the fish please? Is it cormorants or fish type animals. At first I thought it looked like seals though I know they are rare here.