Turning 20 this year, a look at how an idea sparked by "Nipplegate" saw Justin Bieber, "Gangnam Style" and "Baby Shark" go viral.

Source: https://www.dw.com/en/youtube-from-failed-dating-site-to-pop-culture-juggernaut/a-71561377?maca=en-rss-en-all-1573-rdf