ando,
That's a great video, thanks. I have videos of the same thing and have watched numerous foxes do that. I couldn't say if they were facing north or not. They were far enough north already that they almost had to look south to see Alaska!
The ones I watched were catching lemmings and were successful about 50% of the time, i would guess. That is what the second photo above is eating. Although, the foxes around the north slope oil fields are more adept at suckering oil-workers out of their sandwiches than catching lemmings these days!