'Baby shark, doo, doo...': How a 90-second children’s video created a $400-million brand

Pinkfong’s transformation from a small South Korean startup into a global children’s media powerhouse began with a 90-second video released in 2016. 'Baby Shark Dance' became the most-watched YouTube video ever, driving new franchises and now an IPO that valued the company at nearly $400 million

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