South Korea is thought to be one of the more progressive countries in Asia, with its technological advancements and dominance in pop music. But the recent introduction of 5G has led to a rise in secret recordings in public areas, including women’s changing rooms and toilets. The BBC’s Seoul correspondent Laura Bicker takes us through the rise of spy cams and how it’s fuelling the global porn industry.

This is a re-upload of one of our most popular episodes, first published on 11 April.

Producers: Seren Jones and Lucy Hancock