Is everyone science ignorant? Flame can't transfer heat near as effectively as you imagine. The snow was clearly melting on the surface but snow insulates quite a bit as it's full of air. Then the water soaks down to the bottom part of the snow ball. I could clearly see this in the video. Take a garden hose and turn on the water. It's just water from the city that has a temp of around 40 to 60 degrees F. Hose down your drive way at that temperature where the snow can be formed into snow balls. That's the point that the snow is still not cold enough to be powdery and can easily melt. The water will transfer it's heat through the snow rapidly and melt it. Or, spread salt on top of the snow on a sidewalk. The salt will lower the melting temp of the snow and cause it to melt rapidly. This guy is science ignorant as well as having a poor observation ability.