“Going viral” is a distinct phenomenon particular to today’s Internet culture. But if you think about it, viral movements have been around forever. How else do you explain those horrifying motivational posters from a decade ago, or Britney Spears, or Furbies? Ick. An incredibly powerful sub-category of viral content on the Web is video. And everyone from Aziz Ansari to Apple to Allen’s Apricot Farm is trying to produce the next viral hit. Why? It’s all about eyeballs. And yours have probably seen a viral video in the past month, past day or even the past few hours.