For the video, the problem was ice and hills. You need chains/cables or studded tires in that situation. Nothing else would matter.
Of course, plowing the roads and putting down salt or other melting chemicals would have solved the problem.
IIRC that video was from a somewhere in Oregon which normally did not have that kind of weather so they were not prepared for it.
Here there is no need for snow tires because we have tons of plows out and manage the road conditions. And if there is so much that driving becomes impossible like in the video, you simply don't go to work or go anywhere and go out and have fun by throwing snowballs or something.
Agreed. But as you can see some think snow tires = you can drive on anything and be safe. Same idiots I see in the ditchs with 4X4's and thinking thats all they need.