Amal Clooney: 'Yazidis in Iraq are IS genocide victims'

The lawyer acting on behalf of the Yazidis in Iraq is calling for a formal investigation into Islamic State (IS) for the crime of genocide.

Amal Clooney, whose husband is the Hollywood film star George Clooney, told the BBC's Fiona Bruce why she decided to represent the Yazidis - an ethnic Kurdish group - and why their cause was so important to her.