This is the UPS guy in me, but it looks to me that speed and visibility had more to do with it than anything. Id bet that semi in the slow lane kicked up a spray that blinded the SUV driver temporarily, causing him to swerve a bit, and on that icy, snowy road, thats all it took. If he hit some heavier snow in the middle of his lane (which I cant see in that vid but makes sense in the left lane) then that made it even worse.
ESC or not, there arent too many people who could've recovered from that skid in time to not cross over into oncoming traffic. Most, if not all, of us would be just as dead as those people. Really a crying shame what happened.