South African documentary film-maker Mayenzeke Baza talks about his new film I am a Man: how he raised money to fund the film; an unsuccessful crowd-sourcing campaign on Indiegogo; eventual success with Al Jazeera and SABC; the male circumcision rituals of the Xhosa tribe; the dangers to young men, some of whom have died or become infected; the case of the man who lost his penis and his feelings about what has happened.