He is trying to attribute the fact that there is such thing as winter in the Arctic to a Global Cooling of temperatures when there is no evidence for it. He basically says "Well the ice (In the Arctic Circle, by the way) is thick enough for a helicopter to land on, so there must be global cooling!" There is no proof to back that up in the slightest.
I'm not saying that you can't deny global warming, but global cooling isn't a thing. Sorry if I didn't make that clear.
I just remembered, this video kind of reminds me of this -
http://www.youtube.com/watch?v=wb3AFMe2OQY
Before there was global warming, Global cooling was the big scare in the 70's. Not sure if you are old enough to be aware of this, as it probably hasn't been taught in school for a few decades.
The cycle went, global cooling, then global warming, now it is called climate change.......................