When Kim Min-seok gave the go-ahead in June 2016 to publish a 90-second clip of a children's song, he had no idea what he was unleashing. It became a global phenomenon, clocking up more than 16 billion views - YouTube's most watched video ever . That song was the incredibly catchy Baby Shark. Not only has it captivated toddlers and terrorised adults around the world, it laid the foundations for its creator Pinkfong to become a media business worth hundreds of millions of dollars. “We didn’t