Probably hopeless but looking for song

[LostWonderer]

Hello, I am new to the community. I have very fond memories of the show from when I was a small child growing up in rural America in the South. My mother was a big fan of us watching it.. a much simpler time. I have little hope that I will find the song but I thought I would try now that my mom has dementia and my brother has passed away, and unfortunately there is no complete series to reference.

So the song I liked the most and am looking for was a very somber piano piece played as some park footage rolled. I barely remember the footage and song. I do remember there was a bit of foliage and trees and leaves with perhaps a whirling of the camera beneath. It was a small cut lasting just a minute to at the very most three. The melody was very contemplative in nature and sort of sullen and sad but it built into a more positive passage before returning to the moodier sound. I know many of the musical pieces were not named and/or produced commercially. I just really would love to hear it. Its been around 40 years since I have, but it was so magical to see my mom lost in the sound and stillness as a toddler. Any help finding it would be so beyond appreciated, though, again, I have hardly any real hope in such. I looked for it in the early 2000s many times and never so much as saw an inkling of promise. Thanks for your time.