We all grew up with his impactful and hilarious movies, whether it was Dead Poets Society or Patch Adams. That's what makes this guy's impersonations so awesome. Not only does he resemble Robin Williams, he totally nails all of the many voices and characters Williams did over his long career.
YouTuber Jamie Costa is behind the video and has done several other excellent impersonations. Do you recognize all of the characters he references in his video? How many can you recognize?