I saw this movie more than 30 years ago when it was current... there was a rash of Franco-Czech animation collaborations going around at the time...another one was "The Masque of the Red Death", done, I think, by the same people who did "Fantastic Planet", and a few others. "Fantastic Planet", (not to be confused with "FORBIDDEN Planet", a completely different sort of sci-fi movie,) is the story of the enslavement/domestication of the humanoid Oms by the larger, much more civilized Traags. One day, one of the Oms discovers the learning device of his owner, and, thus educated, proceeds to rally his people to rebel against the dominance of the Traags.
The animation style has that funky, artsy-fartsy, primitive quality that makes some foreign or artfully low-budget animations so charming in that certain way. Now, I don't own this DVD, and from what I've read, the subtitles on both the French and English sides are irritating to the extreme....the story, nonetheless, along with the music and general design, is a charming one dealing with oppression, rebellion and pathos. If you can get past what apparently is a MAJOR mini-bugaboo, enjoy this obscure, well done movie for what it is...Art!