What did you learn about these two old women?

I've been working on a documentary about a rural North Louisiana town for the past seven years. I've watched and logged 7 terabytes of footage, edited together teasers and even screened a few shorts. We're editing the full-length film now, and occasionally I find a tiny clip of my grandmother that I don't remember seeing before. Today I found this one, from a 2012 trip. I had been out all day trying to find out information about Roy, the main character. My grandma started me on this goose chase a decade ago. She wanted to know about Roy, she said. After three months of searching, she started to be ready for a new topic. What, she wanted to know, was I learning about her? I've watched it a few times this morning, and I feel a little lighter every time I do.