From the good old days

A neighbor taught my father how to make snow ice cream and he frequently did make it in the evening during a fresh heavy snowstorm. The recipe he had used whole milk, sugar and egg instead of condensed milk as a thickener. It was close to an eggnog slushy... just would have needed some nutmeg! Of course raw eggs aren't safe anymore. :o(

Several people in the youtube comments were concerned with pollution in the snow. They need not be. The first few inches of snowfall aren't usable for snow ice cream (because of leaves, grass, rocks) and those first inches would have most of the air borne tiny bits which those people were worried about. It would have been far more polluted in the old days when every household locally was burning its own coal. Even back when, you'd never make it with anything but the freshest snow. You'd never make it in a city environment, that is you need a big back yard away from alleys, streets and roads. It was fun to have it, but once a winter was plenty.