Reading EVERY Rune in League of Legends

I was talking to my friend whos about gold recently, and I was trying to teach him a bit about what runes to run and why. I quickly realized that despite him playing for so many years, he never read the runes, and I don't think that it's that uncommon for most players to not know what the runes do to a high degree if it's not what they usually run on their handful of champions. So I took the time to read literally every run in the game, and give a brief explanation to why you would run it and give examples of champions that use it best.

This is a video targeted at beginners as it doesn't go wildly in depth. Hope this helps: https://www.youtube.com/watch?v=0e198I47maQ