The story of YouTube is both inspirational and cautionary; the video-sharing website appeared in 2005 and quickly grew to become one of the most ubiquitous and powerful media platforms in the world. It is impossible to overstate its impact on global culture by providing easy and immediate access to news, entertainment media and other vital forms of information. It has, however, helped radicalise some of its viewers with right-wing propaganda and other dangerous forms of media. The story of YouTube is the story of our times; the technology revolution has made our lives easier and more enriched, while also presenting dangers and challenges that make the world a more perilous place.