the FWD Mazda... it was useless on the ice. Once it somehow got back onto the snow... did start to make its well up using snow on snow traction.... where 4WD or AWD comes into play in the slippery conditions is that it would have at least 2 wheels actually driven (open differentials at both ends). Keep in mind, the Jeep in RWD didn't get too far either... when you have both axles driven, less power goes to each axle, so that it doesn't have to fight the traction as much.
Keep in mind what he says in the end.... going back down the mountain, they rather be in the Mazda (or something with winter tires)..... 4WD & AWD gets you going... when you're on the brakes... 4WD & AWD (and ABS) won't stop you quicker. It's back to the tires.
Here's another video:
Yes, AWD with all season gets you going faster... but eventually you'll either have to hit the brakes and/or turn the steering wheel....in this case, the FWD car with winter tires (and the winter tires are the "Performance Winter", which gives up some snow & ice traction for the H-speed rating) is more versatile for driving.
Of course, as I keep on saying.... tires, tires, tires... if you get a AWD car or 4WD truck.... get appropriate winter tires for it.
VDC doesn't cause anything because it tries to correct traction issues. Keep in mind something, it can only do so much in the case of the Mazda, with unequal length driveshafts, What you're seeing is torque steer, in that scenario, VDC cannot correct it. Having the guy just mash the throttle with the traction control doesn't really help...as the brakes will heat up, and the traction control system shuts off (so it doesn't cook the brakes) and left with nothing.