Why is North Korean potato propaganda back?

Potatoes were the star of North Korean food propaganda in the 1990s when the country faced a severe famine. As the economic situation improved, the humble spud retreated from North Korean media. The root vegetable is now making a comeback. State media has prominently featured the potato in news reports and culinary shows. BBC Monitoring’s Pratik Jakhar explains what it means. Video produced by Suniti Singh