Magnolia PicturesShin Sang-ok, Kim Jong-il and Choi Eun-hee in “The Lovers and the Despot.”“Why do all of our films have the same ideological plots? There’s nothing new about them. Why are there so many crying scenes?” This complaint about North Korean cinema — articulated in the fascinating documentary “The Lovers and the Despot” — comes from an unusual film critic: Kim Jong Il, who, as the film reports, went to extraordinary lengths to boost the stature of his nation’s cinema. The lovers (later to become wife and husband) of the title are Choi Eun-hee and Shin Sang-ok, an actress and a filmmaker who made a series of well-regarded films in South Korea, beginning in the 1950s.