I’ve just discovered The Chronicle of Anna Magdalena Bach: A film about Johann Sebastian Bach & his wife. It was produced in 1968 by the French filmmaking duo of Jean-Marie Straub and Danièle Huillet.
The film stars harpsichordist, Gustav Leonhardt as Johann Sebastian Bach and Christiane Lang as Anna Magdalena Bach. The orchestral music was performed by Concentus Musicus and conducted by Nikolaus Harnoncourt.
Enjoy the film in its entirety here.