How much video can a TB hold?

Well, first off, videos range in size. A digital copy of a movie, is approximately 1 hour per 850 MB, give or take a little for each movie. So, 1,000,000 MB is a terabyte. So doing the math. 1,000,000 MB (1TB) = 1176.47 hours. So about 1176.5 Hours of movie. and the all depends on how the movie is coded. but thru iTunes, that's about the size of an hour of movie. (they code in MPEG-4)