The infamous home video released by 2600 Magazine in Autumn 1991 showing Dutch hackers accessing US Department of Defense (military) computers. The video was meant to exemplify the poor state of computer security. No harm was done to the systems. More details here:
This was transferred from an original VHS tape and, as such, the audio and video are of sub-standard quality.
Thanks to YouTube’s 10 minute limit, this video is part 3 of 3.