Revision is the 45th cutscene in Run 3, if counting all of the previous optional and hidden cutscenes.
This is a minor cutscene.
After beating Memory Evaluation part 2, a cutscene showing the Gentleman appears. The Gentleman thinks that this level has a very simple design, plus it looks too easy to complete. He leaves and comes back with a ring. He then changes the layout of the level with the ring. Pleased with his changes, he starts to work on the darker area. Afterwards, he starts to comment that it was easier to move around in the darker area, "at least for one with his mnemonic prowess". The gentleman thinks out loud that he should hire others to do this work, saying that he should not be required to perform such labor himself. He continues walking until he falls out of the tunnel, reflecting what "mnemonic prowess" he possesses, indeed.
He then mentions that it was a relief that no one was to observe that.