Joshua Wong, Secretary General of Demosisto political party, Hong Kong

HARDtalk’s Stephen Sackur speaks to Joshua Wong, a leader of the so-called umbrella pro-democracy protests that swept Hong Kong in 2014. He's now the secretary general of the Demosisto political party. But since Hong Kong is due to elect a new chief executive later this month, who will not be chosen by the people, has the territory's pro-democracy movement failed?