The flaps are the front of a moving vehicle. Air flow would either push the flaps up or push them down, not keep them horizontal.
Grab a sheet of paper, hold it in front of you with the front end unattached, and walk forward. Feel free to bounce up and down as much as you want. The paper will not stick out horizontally in front of you.
The rod and pole are moving, it's just harder to see because they are dark, and the movements are small.
That's what I said, vibrations from the guy moving would move the flag. Vibrations from the ground are more than sufficient.
The truth is that, given the technology circa 1970, it would be harder to fake the moon landings than to go to the moon.