Behind the gas masks of Hong Kong’s democracy movement, the often very young activists are just as diverse as the youths of the rest of the world. But they share a demand for democracy and freedom. They have the will and the courage to fight – and they can see that things are going in the wrong direction in the small island city, which officially has autonomy under China but is now tightening its grip and demanding that ‘troublemakers’ be put away or silenced. Amid the violent protests, we meet a 21-year-old student, a teenage couple and a new father.

• Documentary