You have asked a question that does not really have an answer [at least from the info provided] 1hr of video can be as little as 3~400meg OR it can be as large 3~4gig; it depends on what file format AND what level of compression. Until you answer the above, it is impossible to give you an answer.
I moved your post to the multimedia forum since the forum in which you originally posted has nothing to do with your question.
I moved your post to the multimedia forum since the forum in which you originally posted has nothing to do with your question.