I just watched the video and have a few thoughts.

First off, the flying I saw on the entire video gave me the impression that the jet was really being "man handled", or flown quite roughly (sticks being banged around instead of smooth inputs). It could have been just a bad radio set up with too much deflection and not enough expo, but the video in my opinion leads to the drawing one of these conclusions.

2nd, the crash was probably the result of too little airspeed entering the maneuver for the amount of G put on the wing. The wing stalled and the jet entered a spin/spiral. The pilot never relaxed the flight controls long enough for the jet to recover and gain sufficient airspeed before excessive elevator was reintroduced and the jet stalled/spun again, this time all the way to the ground.

No matter what, it sucks...sorry you lost a good looking jet.

I have done the same thing in the past so I feel for you.

Beave