Everyone from Lord Sugar to Boris Johnson have been on the receiving end of a Cassetteboy mashup in the past couple of years.
The latest efforts by the satirical assassin targets David Cameron (not for the first time) on the day of the Conservative's party conference in Birmingham – and many people tuned into the Cassetteboy x D-Cam alternative speech instead of hearing the official line.
But the question remains, who is Cassetteboy? And how did they come to be? We've scoured the web to give you a brief history of the mashup video artist.