There's way more to it than that. It's a way for women to bond by mimicking nature sounds and responding. They did it for entertainment while men were away hunting food.I understood, it was somehow a contest, which one of the women starts to laugh first, therefore the intense eye contact, and the laughter of one of them at the end. That’s what people said in the comments under the YouTube-video. I was shocked first as well, but if that claim is true, it’s ok.
This isn't the Inuit thread, I know, I just find it crass when people mock traditions.