Tahar Rahim's 'Alpha' male subverted by Julia Ducournau

Film critic Perrine Quennesson tells us why Palme d’Or-winning director Julia Ducournau's latest feature "Alpha" divided critics when it screened at Cannes. She explains how leading actor Tahar Rahim transformed himself for the role and salutes the French filmmaker's imaginative use of imagery in her daring films.