Dad was into 8mm & photography (we had a darkroom in the house when I was a kid) and my stepdad was into videography, so I have lots photos going back to probably the early 1900s and family film going back to probably the early 1950s.
Stepdad put dad's 8mm onto VHS so between my original family and then life with stepdad, I've got more than 60 cassettes to digitize.
By the time my niece & nephews are my age, they'll have about 150 years of photographs and a 100 years of film. These kids kind of got ripped off in the grandparent department being born to my brother late in his life. So though mom was great to them as little kids, they only remember her with Alzheimers at the end of her life.
But with all the video of my mom, they will know their grandmother as I know her, laughing and enjoying life. Instead of having just their memories of their grandmother, they will have my memories of my mom. And even their children will know my mother's voice.
I have only my grandparents action on film but not their voice. My parents do not even have their grandparents on video at all. So this is very new in civilization, that we would know the sound of the voice and the actual movements and an animated sense of the interactions of our ancestors.