Stupid question: Isn't that what you wanted to happen? Or is it cool to have you din so high that you fall face first down mountains like buddy there that almost took him out? Because I didnt see one thing resembling being in control there. What I saw was him losing control of his his downhill ski in almost every turn with the final turn he was either releasing or going face first down that slope with a high din.
Ummm..... not sure what you were watching but I didn't see that. None the less, you never ever want your ski popping off while you're still upright in terrain like that in the video. Ever. That's what led to him falling, not whatever you perceived. Have you skied really steep, rutted surface snow like that? I'm guessing not or you would know that your skis get moved around like that with the downward force from gravity and the variable resistance from the firm rutted surface. At no point did he look out of control; rather very much in control on a difficult slope. Under those circumstances, the last thing you want is your binding pre-releasing. Many of us run fairly high DIN at times for just that reason; it's much better to have your ski on, even if you increase the chance of injury in the event you fall, than it is to have it come off and assure a fall in terrain where you can get hurt from the affects of the fall itself (you fall, you die type stuff in particular).
Edit: Sorry Widluk, didn't see that you had already responded to this post. But as I wrote, and you confirmed in your post, you skied it fine from what I could see in a POV and also did what I would do with your bindings; crank 'em up.