Snow won't melt ???

I'm getting weird emails about snow that won't melt in the deep south of America?
Is there any truth to this ? It seems a bit out there to be true.
Multiple people on youtube videos walk outside their homes pick up a hand full of snow then burn it with a gas lighter?
In every video I watched the snow turns black and (according to the person in video) smells like styrofoam ?..
The snow does not melt, there is no water dripping down, WTF.... ?