This chemical is been used in hurricanes. If they spray it in the eyewall the hurricane will produce more rain and less wind.
And spuerfreak, if you bothered watching the video, the snow is going to fall around moscow. and around moscow there are probably some villages or something that will be buried in snow.
And what if dogs lick the snow or little kids eat a bit of snow, this time there are chemicals in it, and chemicals+organic bodies is no good combination.
The animals around moscow will also have a bit if a problem if there is rwice as much snow. With chemicals.
IF this works for moscow some other cities that are often snowed in might use the same thing.
What happens if a few hundred city in countries as Canada, USA, scandinavia etc need this chemical, they are going to infest billions in it.
And if they do that we get problems ofcourse.
Other then that there's absolutely no harm in it.