
(>’.’)>=O____l_*__O=<(’.’<) by Oliver Laric

(>’.’)>=O____l_*__O=<(’.’<) by Oliver Laric
Density by K.O Götz, 1962. Although technically more similar to pixel graphics, this computer animation looks rather textmode to all the whales in the house. Also available on archive.org.
Eduardo Kac, Tesão, 1985/86 – Videotex (minitel) animated poem.
Le Merle (The Blackbird) by Norman McLaren, 1958. More.
Animated fish tank in ASCII by Daniel John Jones, some time before the original post in May 2012.
John Whitney’s 1972 work Matrix III remixed in ANSI by YouTube user skuzzyanimation, who has more ANSI-interpretations like this.