A video that spreads quickly via the Internet. It is often a short clip on a video sharing site such as YouTube or Vimeo that people reference in blogs, emails and instant messages.
In 2012, a half-hour documentary was produced by Invisible Children, Inc. about Joseph Kony, head of the Lord's Resistance Army (LRA) in Uganda, who was indicted for war crimes in 2005 by the International Criminal Court. Uploaded to the YouTube and Vimeo sharing sites, within a week, the video was viewed by more than 80 million people. See viral marketing
and hyper viralized