What are people looking to do? The most popular searches, by one analysis, range from the achingly prosaic to the exceedingly specific—from “how to kiss” to “how to make a rainbow-loom starburst bracelet.” You can learn how to boil water, field strip an AR-15 rifle, or fly a 747. But stories abound of people—usually kids—achieving impressive proficiency in everything from opera singing to dubstep dancing by simply copying what they have seen in YouTube videos. YouTube pedagogy has swept through—and virtually helped create—fields like competitive cubing (Rubik’s), where solve times have plummeted, aided largely by the transmission of techniques via YouTube. – Nautilus