Witnessing a you tube feud is as simple as searching YouTube for any controversial topic (abortion, racism, animal research, etc.) selecting one of the top videos, and scrolling down to read the user comments.
YouTuber1: "The above video fails to mention how (topic) mostly is the result of (pointless opinion)."
YouTuber2: "@YouTuber1-That's pathetic. Let me tell you a thing or two about (topic), it's called (pointless opinion)."
YouTuber1: "@YouTuber1- I'm not sure where you get your information, but you misunderstood what I said. If you had just READ MY POST, you would have understood that. The whole point of (topic) is that (pointless opinion)..."
And on and on and on...