The History and the Evolution of Computer Viruses
A fascinating look into the history of computer viruses from ~1985-2011.
Some of the early viruses were actually quite funny – see V-sign at ~9:10, or walker at 10:44 and ambulance at 11:25 for far funnier versions, and alex at 11:10 for a neat animation.
Sidenote: the audio is terrible. I can hear a mains hum for half the video. Seriously, FIX YOUR GROUND LOOPS!!!