I have no opinion on the movie as a whole, but couple things that stood out from the trailer

"North Korea - the most evil dictatorship known to mankind" - uhmmmm, really? More evil than(just in the last 100 years) dictatorships of Mao, of Stalin, of Pol Pot? By what measure?

"art in a country that does not tolerate art" - well that's just simply not true at all. North Korea both has and values art - just not the same way other countries do. One of the most internationally known facts about North Korea is the Arirang Festival - and what is that, if not art? Even its propaganda is art.