Looks to me that all interesting features has been completly sanitized.
That video makes it look very much like it “used to be” exactly like it is now at some point. Those cobbles didn’t occur naturally.
It’ll bed in, it’ll wash away and in a few years it’ll be a bit less tame.
And let’s be honest, half the trails in the Lakes have steps cut in, cobbles dumped down them, gravel, slabs etc. including a huge number of “classic” descents that people get all excited about. None of them got that way on their own.
It’s the up shot of it being a fairly well maintained and massively popular part of the country for out door activities.