THIMPHU, Bhutan — As a crew of 35 people today geared up to make a motion picture in Bhutan’s distant Lunana Valley, they confronted a slew of seemingly insurmountable obstructions. The valley had no electrical energy. It could only be attained by strolling 8 days from the closest village. And the schoolchildren who were being expected to star in the film understood almost nothing about acting or cinema. “They did not even know what a camera was or what it appeared like,” Namgay Dorji, the village schoolteacher, stated in a telephone job interview. On Tuesday, the film, “Lunana: A Yak in the Classroom,” was nominated for an Academy Award —…