Nick Broomfield on Whitney Houston

With Francine Stock.Nick Broomfield reveals why he decided to make a documentary about Whitney Houston and why her family refused to help him.Francine visits the Sheffield Documentary Festival, where she gets intimate with virtual reality, discusses the ethics of deceiving your subjects and learns about the ways to pitch your movie - with the help of film-makers Jane Gauntlett, Mark Grieco, Mette Carla Albrechtsen and Saeed Taji FaroukyHistorian Alex on Tunzelmann has made her name spotting historical inaccuracies with her book Reel Histories. But now she has jumped ships and written her first screenplay, Churchill. So what does Alex Von Tunzelmann the historian make of the work of Alex Von Tunzelmann the writer ?