Reminds me of a spoof video I saw on YouTube years ago, "Saving Ryan's Privates" - I'll let you guess what the original was... However it had lots of lost bits.... I couldn't find it in a quick search, mostly I found links to a later "Adult" film that seemed like the same idea,. I did find https://www.imdb.com/title/tt0221532/ which might be it, not sure... Found it - https://www.youtube.com/watch?v=Bm-Od5pBCsQ

WheelyFixed