I'd be very careful about supplying generally 'northern' source material, as the Arctic is very diverse. North of 60, for example, is set in the Dehcho which is the western arctic; the aboriginal population would be mostly Dene, and I believe the dominant language would be Slavey. Pond is the eastern arctic, the population is predominantly Inuit, and the dominant language is Inuktitut. It's a completely different cultural context.
For depictions of the eastern arctic on camera, the most important figure in recent Inuit cinema is Zacharias Kunuk. He is from Baffin Island, though from Igloolik and not from Pond, and his film
Atanarjuat was the first full-length film to be done entirely in the Inuktitut language. It is historical and not contemporary, but the language is absolutely authentic and you can certainly see what the landscape and climate of the eastern arctic is like.
For other cinema to look at, both classic and contemporary, I would explore the Inuit film collection of the National Film board and the Unikkausivut project:
http://onf-nfb.gc.ca/en/unikkausivut-sharing-our-stories/the-nfb-inuit-film-collection/
https://www.nfb.ca/playlist/unikkausivut-sharing-our-stories/
If your book is contemporary in time, I would especially recommend the hour-long documentary
Inuuvunga on the second link, which was shot by Inuk teenagers documenting their own communities. Understanding the role of language and tradition in the culture, the relationship between youth and elders, and the way the north is both changing and staying the same, are vital to writing an authentic and sensitive portrayal of the Arctic. Good luck!
