Was shown in German cinemas starting January 1918. One can see F.13 Falcon II, crew manning tank and tank roving around, including a huge tree being pushed down, and F.41 in Berlin, also on the move being demonstrated to the press. Ends with an advertisment to buy war bonds.
Note that the poster depicts F.41 in grey colour, supporting my thesis that several replacement tanks were rushed forward in grey factory colour, without receiving the standard chocolate brown Tank Corps hue.