As others have mentioned, many video sections are repeated several times. It even looks like some may have come from movies, as you can see a shell explode about ten feet from a man who appears not to notice it. The history of the time and the strategies of the combatants seem to be pretty well conveyed, in compressed form. From that point of view, it is informative. But what detracted so much, for me, was the narration. So many words are idiotically mispronounced: quay, Kriegsmarine, and place names like Liege, Aachen, Verdun, not to mention the ubiquitous German preposition "von" and names like "Wilhelm." I found myself laughing, and wondering if they set out to make the thing sound like a high school production!