tv and movies online

Does anyone know how many MB or GB are in a movie or TV show watched online?
I will be shutting off my Directv and my home phone/internet and would like to be able to do everything online with a wireless card but someone told me that watching TV/Movies online would make me go over my allowed data.
Avi format movies are 600-900 mb and mpeg is 4 gb. If you’re downloading movies in avi format, you’ll need alot of bandwidth. If you have broadband internet, you don’t have limited internet access. If you’re recorded by your internet provider as a bandwidth hog, then they just might cut your bandwidth a little. So you might experience a little down time, meaning slower speeds than normal.
Britney Spears on America’s Got Talent Live Singing “Hit Me Baby One More Time”
