The footage of one part of the exercise was supposed to show a remotely-piloted aircraft being destroyed by an air-to air missile. However, footage from the 1986 film was substituted for the crucial destruction shot. This was quickly noticed upon release, and has raised questions about the veracity of the exercise coverage in the first place.
While some military exercise footage may be simply unsuitable for release due to picture quality, CCTV has been known to use film footage in this way in the past. Falsifying the video record of military exercises makes for good propaganda - unless detected.