The music from this animation is played in THIS video. 5:55 is the timestamp when it plays.
Animation starts with a disclaimer that reads "THE FOLLOWING TAPE IS FROM A DISTANT FUTURE" or something like that. Then it pictures some crudely drawn man/alien/something with a beard screaming for 20 seconds accompanied by a beautiful music. No amount of google tampering helped to find this gem. This is my last resort.
If you know this animation by chance, let me know. The sooner — the better. I can't imagine what stuff google will put in my ads after analyzing my search history.