Hey Joe, me too. I won't dare to go there.
As far as I know those are the best british wavesailors.
I like the nice riding even without advanced tricks and moves, in a not so sunny and warm situation.
Impressed also by the quality of the Witchcraft board, I suppose HDD, also because going out there I think is a big danger for normal delicate boards.
Therefore imho the video shows how much more opportunities of surfing is given to a wave windsurf than a surfboard, look at the ever-swimming and ever in the middle of b^&&$ surfers. Yes, for sure I'd have crashed with the one missed for few cm/inches...
But with a sandy beach last october I've tried to somewhat (wind)surf a medium wave and was sooo exciting! I want to do/learn all the wonderful sides of our incredible sport, even with my c6-c7 little problem...