SEOUL—“Baby Shark Dance,” the aggravatingly addictive children’s tune, is YouTube’s most-watched video ever. It has been played, on average, more than 4.7 million times a day since its 2016 upload.
The wildly infectious and relentlessly repetitive children’s song “Baby Shark” became the most-watched YouTube video on Monday, with more than seven billion plays. The bane of parents and teachers ...