Fake effect.
I will say though that the super large dendritic LES snows tend to have higher vis for the same rates. Of course it's huge amounts of 30:1 fake fluff. idk about 28" in 4hrs there. Where did he get the 28"? Did they measure before every time they snowblowed? In a 4hr sample like that you shouldn't be clearing at all. So I have my doubts. 4hrs of 0.25" liquid at 30:1 would give you 7.5"/hr and 30". But again, by hour 4 the weight of that is compacting the earlier snow below it.