They also have a few side channels. Hank has his own channel, and a gaming one. There's one with science news and biology/history. Hank also has a web series that's the modern version of Pride and Prejudice. There's even an internet quiz show called Truth or Fail. I, of course, am subscribed to all of them. I even used all of my extra time last summer to watch all the videos (which was only about 750 at the time) on their main channel, vlogbrothers.
okay im done being off topic now. slightly on topic, i was one of the hipster kids who heard the song on tumblr when he released him playing it for the first time.