Legendary cellist Yo-Yo Ma and Bhutanese auteur Pawo Choyning Dorji are heading to the Telluride Film Festival with “A Song for the Snow Lion,” a 21-minute short built around a Himalayan folktale about vanishing glaciers. Variety is unveiling the film’s first trailer. Dorji’s “Lunana: A Yak in the Classroom” earned Bhutan’s first Oscar nomination, for […]