Oral histories are available online from a number of different sources:
Documenting the American South: Oral Histories of the American South Listen to interviews with Southern civil rights and political leaders. From the University of North Carolina, Charlotte
Mountain Voices This website presents interviews with over 300 people who live in mountain and highland regions round the world. Their testimonies offer a personal perspective on change and development.
Voices of Feminism Oral History Project From the Sophia Smith Collection, Smith College, Women's History Archives - narrators with a movie camera icon next to their names include videos that you can watch
Voices of the Holocaust At the British Library's website, you can listen to first-hand accounts of holocaust survivors