(NOT MY VIDEO) came across it on a post that was taken down,trying to archive Peanuts media.this is 1/3 found and the beginning of the song is missing.This apparently aired on a Brazilian children’s program back in the late 80s,The scene itself is from 1969.
It's interesting to contrast this with the finished version of the "Failure Face" scene. I feel like if they'd kept it like this, it might have been funnier whereas in the movie as it was, the scene was just painful. (I don't mean that as a criticism. I think it was meant to be just painful.)
The only reason I can think of as to why they would change it would be because maybe they thought part where Lucy smashes a wine bottle on Charlie Brown's head like she's christening a ship a tad too tastless and violent. And the scene with Linus on the bus was might have been cut because they thought kids would be freaked out by it