One thing I really objected to with this documentary was the attempt to make a realistic soundtrack to what was very obviously silent film footage shot long before the advent of sound on film [[1928-1930). I just find this to be revisionist. Silent film uses music to give context to the visual on the screen, and they aren't serving history by doctoring this footage with traffic sounds, hammer blows, crowd noises and such. Half the audience under 40 probably don't know that film didn't have sound for the first 35 years, and doing this isn't going to educate them.