Quoted: The company also hasn’t detailed how it defines “quality” or “educational” videos. So one of the best barometers for YouTube’s metric is its Kids app, which places videos front-and-center once a viewer logs in. The educational merits of these choices are up for debate. Heather Kirkorian, an early childhood development professor at the University of Wisconsin-Madison, opened the app this week and found Baby Shark and Lucas the Spider, two global hits. “I wouldn’t consider them educational. I would consider them wholesome,” she said. “The term ’educational’ is used as an umbrella for ’non-harmful.’”