This short 'making of...' is not a making of in the traditional sense of the word, and in that way it disappoints.
Spielberg, Hanks, Damon, Kaminski, Stephen Ambrose, Dale Dye and others are interviewed, giving their view on the film and - mostly - on the war and how brilliant Spielberg portrays the war (and they're right).
If you are looking for a making of Saving Private Ryan, you're in the wrong place, but if you're looking for some insight of the war by the makers, you'll have a good time here.