In the mockumentary "Probing the Holocaust", the transcript of which is available here, Germar Rudolf presents the footage of the Balard shooting range in order to "prove" that the Allies were engaged in an outright Holocaust-related fraud.
The Balard shooting range was built in 1938 in Issy-les-Moulineaux, at the boulevard Victor in the XVth arrondissement of Paris for training police offcers. It was demolished in 1964. During the Nazi occupation it served as a place of torture and executions.
In his mockumentary Rudolf brings up the postwar footage of the shooting range during his segment on the gas chamber of Dachau (which will be dealt with at a later date). He tries to prove that the footage proves that the Allied Psychological Warfare divisions were faking evidence of Nazi atrocities, and thus wants to dismiss the Dachau gas chamber as another such fake.
Let's take a look at his arguments.