I was 'officially' too old to be watching 'Sesame Street' in its prime, but I still watched. I was in elementary school. But this short film pulled me in EVERY time. I waited for it to come on.
I still love it.
Vivaldi's music remains a favorite for me. It took years before I knew it was his music. I love the film here, too. From start to finish. I may have moved around to it, too.
(The same music was also used many years later in a favorite-for-me movie -- "A Little Romance." )