This 5th episode of the BBC documentary of World War I goes over the Eastern Front, Italian Front, and Serbian Front from 1914 to 1916. It discusses Hindenberg's and Ludendorff's victories, the horrible conditions fought in the Alps and what happened to the Serbian soldiers and civilians. It does a good job explaining the war and my students were amazed at the fighting in the Alps and talked about it for days.
The movie guide has 12 true and false questions with an answer key.
The documentary is on Youtube, Amazon Prime and other streaming sites.