WWI: The War to End All Wars.
This 3-disc video collection is a cheap knockoff (2011) of the 5-disc box set Trenches: Battleground WWI (2006). The people who decided to reproduce the public domain period cinematography from that presentation gave the episodes different names and rearranged them, substituted a terrible American narrator who couldn’t correctly pronounce many of the place names, substituted a horrible ragtime instrumental number for the John McCormack ditty, collected all of the video stills into one “bonus slide show” segment, and omitted the other extra features of the original set (which are not in the public domain).
Not worth the price, even used and hugely discounted. Look for the original, instead.