A complete hoax.

The film footage is remarkably similar to the set of the movie First Men On The Moon which came out a few years earlier.

Nixon, the president at the time was a proven liar' The flag flutters, although the moon is windless. Cold war was the motive. Hardly anyones been there since. You have motive from day one.
All this so called space travel is merely orbitting around the earths outer edge. We'd burn up if we went any further.

The biggest lies are always the most believable.