I don't know the answer but there are a few. The video was shot from a GoPro camera mounted on the top of a Laser mast at the Blakeney 2015 Regatta in North Norfolk. I rather like the video anyway. Blakeney has a lot of Seahawks moored there, about 10 in all I think.
https://www.youtube.com/watch?v=dRuIrjNGPkw&feature=youtu.beIan