This is an older documentary film about soaring, including interviews with the original Schweitzer brothers and a nephew of Orville Wright who was actually present during some of their early flights.
Copyright at end says 1988. Apparently an episode from a TV show at the time.
Just around 13:00 that is Les Horvath flying near the Sierra Estrella and the Estrella sailport. That is sort of my home gliderport. Les founded it with his brother in 1969. A lot of this is shot at Estrella actually.