This is my first 2nd Mac product besides 2 iPhones, and we just bought a new 27" iMac and have noticed that while viewing videos like Youtube or Hulu. The videos are choppy, almost like stop motion. It is kind of annoying and it kind of makes me dizzy watching videos. I don't do a lot of video watching but have lately because of this nice new computer. I'm not sure it's my internet connection or the website, since I'm no expert but I have a 20meg connection with 10 upload which is not shabby. What do you think is wrong.