Recently I watched a 1947 film called 13 Rue Madeline, which is a fictional story about OSS operations in France. Early on a training sequence suddenly cuts to footage of three fighters flying at very low altitude. Two of them get too close to each other and crash. The film then cuts back to a room where trainee are asked questions on what they've just seen.

It seems incredible, both that the crash was filmed and that the footage found its way into a movie. I can't identify the aircraft or the location. Could anyone? The sequence begins at the 2:36 mark of this video:

http://www.youtube.com/watch?v=gJBge6syFco