Believe it or not, YouTube is celebrating its 10th birthday and what better way to do just that than with a YouTube video that quite successfully captures the broad range of viral goodness to come from it. Backed by Blackalicious’ famous rap “Alphabet Aerobics,”  the video “The A-Z of YouTube” crams over 75 references and 18 filmmaking styles to show off the sheer amount of creativity and variety its content creators have contributed from the past decade. A personal favorite of mine makes the cut; do yours?