Not 100% sure where the video was shot, but I was up there yesterday and it is an absolute bogfest. There was still a fair bit of snow and ice around, although it’s warmer this evening so might have melted. Didn’t try the Powerline as the TT was run down there at the weekend and it was a river of mud before that.
If you do a search in my profile for similar threads, I’ve posted up my usual Strava route in the past.
Edit: forgot to say that my usual advice to chopwell newbies is to head uphill on fireroads and just explore any singletrack that appears and takes your liking. You won’t get lost (it’s a small place) and, if you do, head uphill on fireroads to get to the car park or downhill to get to Lintzford/the river.