To me it looked like he panicked, came off the throttle and changed his body position most likely due to the corner tightening up on him.
Didn't happen until the tire started to tuck. When the tire tucked, he tried to pull it up, but when the front goes it happens way too fast.
The front doesn't look worn to me;
Doesn't need to, those are track day tires. They have the lifespan of a nat with a chronic cough. And that type of rubber requires a good deal of heat to perform well. They develop a lot more heat at track speeds. Also, if you watch the beginning of a race, you'll notice some covers on everyones tires. Those have warmers in them specifically for that reason.
The video also shows the value of experience. Same corner, same model bike WAY different results.
It also confirms that there is a difference between 10 years of experience and one year of experience 10 time
You could just as easily post a vid of an uber talented racer wrecking in a place where lesser men breeze thru. Anyone can have a bad day.
I went and watched GP qualifying last year at Indy and all the top stars were all wrecking in the same area, just in front of our bleacher seats. The announcers noted the change surface types at that point.
I did a track day at Mid-Ohio once with some very fresh tires. I was running with the A team and for the first several laps we were monitored to make sure no one was in over their head and the guide was making a pretty good pace for just hopping on the bikes. Anyway, my bike was fine until we got up to a corner called the horseshoe. There was a big cement patch there and every time I hit that damn thing for about the first ten laps, the tires squirmed all over the place skeerin the livin pee pee outta me. After the track got warm and the tire broken in, everything was fine.
Most times on Mulholland its a rider mistake, in this case, I'd give the guy the benefit of the doubt that his tire just went off.