Watch full movie online. Longtime fans of bluegrass music and those only recently discovering it will appreciate this documentary on the genre, which was born of a combination of African and Celtic sounds and is the base of American country music. This film traces the musical form from its Appalachian roots to the present. The rise, fall, and consistent revival of bluegrass chronicled through oral history and visual record, resulting in a priceless film that even casual fans are sure to enjoy.