VIDEO: Lunar Lander simulator film with narration

This video appears to have been taken during a presentation that was screening a film with no apparent sound from the 1970s showing what seems to be a lunar lander simulator. This video's Youtube page, provided by someone called easynow, has a long description but does not state who the persons are that can be heard speaking during the presentation, one of whom sounds like they must be an Apollo astronaut because they are talking about what it was like to fly the lander over the lunar surface. The Youtube webpage blurb says

What you are seeing there is not a LM landing simulator, but rather that footage is showing the SMK-23 Flight Simulator at the Marshall Space Flight Center in Huntsville, Alabama.