...would of been a very short movie.
LOL, “have.”
I was going to write,
‘Uh, no. What you’re hearing as “of” is the contraction, “’ve.” People are saying, “would’ve,” as in “would have,” not “would of.”
‘If you’re going to be a grammar Nazi, don’t be embarrassingly ignorant of grammar.’
But then, I got some slimmer of hope that you were mocking internet nerds, and meant your correction ironically.