What have you learned from YouTube or other online videos?
Yesterday someone posted a deal for a "magic" egg timer that tells you when your eggs are done boiling, and it made me think about the YouTube video I watched a few years ago that showed me the way to make perfect hard-boiled eggs*. I've also learned how to build a fruit fly trap, take a screen shot on my current laptop, beat level 4-30 on Angry Birds Space, and more. What important/unimportant life skills have you learned from YouTube (or other online) videos?
*Place eggs in pot. Cover eggs with cold water. Bring water to rolling boil. Turn off heat and cover pot. Wait 13 minutes. Remove eggs to ice bath. Roll each egg on counter. Peel.