A gem indeed! I don't know where I've seen a better job of film restoration, outside of "They shall not grow old."
Lots of little details stick out. First, the fragility of these pre-war aircraft. Second, how it only took two men to lift the engine. Third, the transitional phase of this aircraft: elevator in front, like the Wright's, but ailerons on the wings. Lastly, at 1:25 of the film, there is a young man looking back at the other technological marvel of the age -- a moving picture camera!
Hard to believe this was only 110 years ago.