Writer - Researcher wrote:

I need help as to where to obtain "dog fight" images/video of WWI plane
fights. I know that the Imperial War Museum (Britain) probably has such
archival footage. However, I'm wondering if any other sources, perhaps in
the United States, France, etc. might have such archival WWI film footage?

You won't find movies of actual combat, partially for the reasons Corky
provides. In addition, Britain forbad any photography of any of their equipment
in action. One pilot did violate this regulation, and one of his photos has been
colorized and used as the cover for the Jane's Aircraft book of this period. One
of the side effects of this regulation is that there are excellent photographs
of German engines in Jane's, but all of the shots of British engines are wrecks.

I *have* seen some footage of German and French aircraft taking off (and it's
amazing how rapidly a Fokker D-7 gets off the ground). Check with the Deutsches
Museum in Munich for info about German archives. The Imperial War Museum at
Duxford may also have some stuff. I don't know where one would find French movies.

In addition, I'm seeking WWI posters, regarding the aviation aspect of the
war

Google returns many hits for +poster +WWI +air. Here're two.
http://www.snapshotsofthepast.com
http://www.worldwar1.com/posters.htm

George Patterson
Drink is the curse of the land. It makes you quarrel with your neighbor.
It makes you shoot at your landlord. And it makes you miss him.