that's an old vid, there's plenty of new/better stuff now.
I recken a hardtail or short travel full sus would be good, the dh tracks are pretty tame, you can do pretty much all of them on a rigid bike if needed, but front sus would make you faster.
the tracks are pretty short, the newer ones with berms and stuff are under a min long, but if you go from the top of the quarry, expect closer to 3 mins (but with a couple of flatter section).
DEFFO take a hardtail or rigid for the pump track though!