I have a 16mm print of the original version of the film as released by the War Dept. in 1950 (copyright is on the introductory title). Both the 1948 original theatrical release and the 1950 War Dept. release can be found on youtube. The most interesting difference between these two prints of THE ORIGINAL VERSION is that the US release has several mute spots on the soundtrack during the courtroom sequences. These muted sections can be heard in the original 1948 print. The film is a remarkable summary of the crimes committed by and the punishment meted out to the defendants.
As for the 2009 version, released in2010, that is a different film and should be discussed separately. The score has been re-recorded, new narration has been added, courtroom voices have been restored (they were replaced due to issues of aural clarity). In short, it was created from a new millennial frame of reference.
To understand the impact of the original film I suggest you seek out the original version. While the youtube print of the 1948 release is poor, there is a gorgeous 35mm print of the 1950 US version.