Here is one thing I did while my mother was still alive, and I highly recommend to everyone. I wish I had been able to do it with my father before he left this visible world.
I recorded about 8 hours of "60 Minutes" (I think our folks out USA know what I mean) like interviews with questions such as "Tell us about your hardest time" and "Tell us a secret we don't know" and "What advice would you give your grandkids in their twenties" (our son was still a toddler), etc.
At first she said, "Oh, I could never talk much" ... then she filled 8 hours!
Many of the stories, of course, I had heard 1000 times ... but many things I never heard before! Also a couple of "family secrets" (not too serious, but very poignant).
Maybe, with all this time at home, we will rewatch the video now that the kids are older. Our daughter never met her.