This is just a compilation of several pieces of footage filmed by combat cameramen on various fronts during World War Two. Some pretty amazing pieces of film. Highlights for me were GI firing a .30 cal form the hip, German firing an MG34 from the hip, 3:04 one of the view existing pieces of footage showing American and enemy troops fighting in the same frame.
Warning: There is some brutal stuff in this video (i.e. people burning and people being shot)