Here's a funky little piece of weekend edutainment: the history of the Twitter hashtag as performed by horn player and YouTube music video maker Paul the Trombonist. Raps interspersed with jazzy trombone interludes tell how the now-ubiquitous number sign followed by letters went from a random nothing on the social network to something tweeters today rely on to spread important news, share jokes and tell they world they're #winning.
We haven't vigorously vetted Paul's history lesson, but it checks out against a quick web search.