Daicon IV Opening Anime

From Wiki

The DAICON III and IV Opening Animations are two short, anime, 8 mm films that were produced for the 1981 DAICON III and 1983 DAICON IV Nihon SF Taikai conventions. They were produced by a group of amateur animators known as DAICON Film, who would later go on to form the animation studio Gainax. They are known for their unusually high production values for amateur works and for included numerous references to otaku culture.

woohoo!! thanks to Vincent for the historic link lolz... indeed the animation for the 2nd film was really well done