Zen POV

 I'd consider this a black diamond trail for sure. Posting it green or blue is going to attract new riders and it's not not a good trail for someone who's never dealt with technical terrain. At least they've been warned of what they're getting themselves into.

 My thinking is that mandatory trail features that require an advanced technique are Double Black. If you can ride around something that is advanced it is only single black.

 The video is just a taste, and it is not easy to see that the transitions can be difficult. The difficulty levels are also somewhat relative to the area. If we marked this green, every trail in Green Valley would be green.

 does the climbing make it a double black diamond? the descents look more green or blue than double black diamond.