preserve.

The way a person tells a story is so much a part of the story itself.  Their particular turn of phrase, their unique voice, their distinct mannerisms.  

Generations of families not yet born can experience their elders' recollections first hand.  Not only will they learn valuable family history in a first hand way, but by seeing and hearing the physical and personality traits they share with their storyteller, they'll connect in a very personal manner.