That rotary plow is way cool (in every sense of the word) - though if I were the scale engineer I'd go punch the guy with the shovel in his big toe for adding more snow to the tracks...!
So what does a G-scale loco like these weigh and how does that mass scale up to the real world? The 'adhesion' factor must be vastly out-of-scale? so, for the matter is the density of the snow - the snow in the video wasn't powder. Still, very neat