Chiwetel Ejiofor on The Boy Who Harnessed the Wind

Chiwetel Ejiofor visits the BFI Southbank to talk about his directorial debut, The Boy Who Harnessed the Wind. Based on the autobiographical book by Malawian author William Kamkwamba, the film tells the story of how, inspired by a science book, the 13-year-old Kamkwamba built a wind turbine to save his village from famine.