A terrible accident, and good to know he survived !
But I can not see anything "sketchy" about that place, except for maybe gusty wind as there is land on the other side.
Actually it looks way better than most spots IMO
By the way - what happened - did a line break ? It did not look that way...
It might look like the (unfortunately) classic error - to hold on with one hand only, when a gust hits and you get scared, and then things will accelerate into a nightmare very fast
Let go with both hands, or hold on with both hands - NEVER hold on with one hand (and releasing of course the most important, but it was covered in the text below that he had not learned/practiced this).
I've seen one getting seriosly injured and hospitalized because of letting go with one hand, and this was in pretty normal winds - and then he got catapulted up and hit the ground so hard when the kite looped down again in the zone, that he stopped kitesurfing for good after recovering...
Unfortunately it IS the normal way you react, when the bar pressure suddenly increases (especially with a kite like in the video with almost double amount of bar pressure, at least higher than average
You will let go because you dont want to get pulled "over" (forward), but you keep holding on with one hand, as you feel you have a bit of control of things then
Which is the absolutely worst thing one can do - even holding on with both hands and getting lofted is not nearly as dangerous IMO.
So a natural thing to do, when new - and we are all responsible for teaching this to new kitesurfers