The YouTube playlist "The Great Programs: The History of The usa" (playlist ID: PLXR6KmNsDBjTR_gtamh0qo5fNtxYlPiah) gives an in-depth exploration of yank background through a number of participating lectures. Sent by historian Allen C. Guelzo, this 48-lecture class, produced by The good Classes, spans through the earliest indigenous peoples to contemporary moments. https://www.youtube.com/playlist?list=PLXR6KmNsDBjTR_gtamh0qo5fNtxYlPiah