The videos are really educational, I loved them. I like the way this narrator was giving tips for descending.
However, it is pretty scary to cycle downhill anyway, especially if the roads are not asphalt but rather a bumpy old sand roads. Use brakes as much as possible and be careful. I tried to be a hero once, using a shortcut from the mountain (not wanting to waste my time using the asphalt road), and I paid a dire consequence. It is better to be safe than sorry.
I think at one time or another we've all decided to take the shorter, more dangerous route thinking we can handle it, and it's not till we're half way down we realise how foolish we've been!
On more than one occasion I've ended up losing it as I've taken the crazy route instead of the more sensible option. It all adds to the fun though...I guess?!