Frosty the Snowman is a 1969 Rankin/Bass animated television special loosely based on the song by the same name. There's a short segment from the beginning of the show here:
It's not my favorite holiday show. It's too pointlessly silly and really bears little resemblance to the song that inspired it, so I wonder why they didn't either come up with a whole 'nother story or be more true to their inspiration piece. I have the same complaint about the Disney fairy tale movies. I don't have much company in this opinion, I know.