1. Um, that site is specifically designed to show the difference. FPS stands for frames per second, which is how many pictures are shown in one second. Movies show 24fps, standard video shows 30fps. The higher the fps, the smoother the video tends to look. Showing pictures quickly gives the illusion of motion. I know what I'm talking about.
2. I see something differently than you? I have a differing opinion? Impossible!
3. My computer is, in fact, stuff.