We have a brief video from a friend of the Forgotten Weapons site showing a standard M1915 Chauchat in use. Although short, the video does a good job of showing the gun's rate of fire and general operation. You can see the open magazine design that caused so much trouble, and see how the heavy reciprocating bolt and carrier cause the gun to bounce as it fires.
http://www.forgottenweapons.com/chauchat-followup/
