If you came here from this video on Newgrounds and you're trying to find the story it's based on, it's called "The Difference" and you can find it here.
If you're wondering why the creator of the video didn't bother to provide a direct link to the story in question, and went so far as to put "Concept by: Jimtopia" in the credits, your guess is as good as mine.
Personally I wasn't a fan of the movie and here are several reasons why. Why is everything slowly moving sideways? Why do the guy's eyes blink one at a time and why is his chin a polygon? Why are his pupils square? Where's his nose? Why do the light on his face and the light on his chest flash independently from one another?
Artistic concerns aside, I don't think the concept would ever have worked as a movie. Firstly, the original story is just a textual conversation. There is no action to it, and filming one of the participants participating in the conversation is just boring, whether or not you film that participant's reactions to the story content, and whether or not you actually leave in the pauses between things being said while other things are being typed. Secondly, filming one of the participants breaks one of the fundamental tenets of the original story which is that you have no idea whether anybody in the story is actually real. The characters "A" through to "I" might well be chatterbots as well! This is deliberately left ambiguous, but the movie removes that ambiguity, as any such movie would.