Aaron Sorkin's proclivity for self-plagiarism is fairly well established.
In fact, the acclaimed screenwriter is so comfortable borrowing from himself that he recently used bits from an old commencement speech he gave at Syracuse University in a new commencement speech he gave at Syracuse University.
Fun Fact: One of the most memorable lines from The Social Network — "If you guys were the inventors of Facebook, you'd have invented Facebook" — was actually recycled (with minor tweaks) from Sorkin's short-lived NBC dramedy Studio 60.
You might say reusing dialog is as much a part of Sorkin's MO as the walk-and-talk — and DrFunky17 would agree. The YouTuber just put the finishing touches on a compilation that chronicles all the reused lines found in Sorkin's various TV shows and movies.
Enjoy your favorite Sorkin quotes, uttered by your favorite Sorkin characters, over and over again.