Excellent Board Track Film Footage

Two silent film clips flagged by Brian Pratt of the Yahoo Auto Racing History Group offer some unique images of board track racing in the United States during the 1920's. Anyone with any idea where these films were taken, please comment. The first film demonstrates the dazzling speed of these cars that must have made for an exciting show. The second of the two films apparently used an in-car camera - amazing stuff for the time.