Just watched this - amazing in so many ways... I tried looking for more information on Ahn Chol and supposedly he is just MIA for quite some time.. Hope he is alive and safe somewhere.
I've watch a number of "inside NK" documentaries and I agree, this is one of the better ones (despite the hipster host's somewhat condescending attitude). There was some good footage of interaction with NK common folks and the host keep trying to push the buttons of the guide. Give you a sense of how repressed they are without even knowing.
A lot of what they show resembles Artemii Lebedev's experience.