Three are lots of oral histories collected from older people before they pass. The stories and events that one generation takes as granted become the history for the next. Here are a few oral history sites–some simple, some more in-depth–that might interest you.
Library of Congress, Voices of Slaves
Society of American Archivists: Oral Histories from the Greatest Generation
Canadian Oral History Association
British Library: Oral Histories
Library of Congress Digital Collection
LGBTQ Oral History Project, University of Mary Washington
Arizona State University: Native American/ First Nation Oral Histories