[karaban]

I'm trying to clip a bit out of a very large video file, so that it can be posted here. I should point out at this stage that I've never used any video editing software or anything like it before. So I downloaded Virtual Dub, and worked out how to clip away all the bits that I don't need. I then saved the bit I wanted to post, but even though it's only a minute and a half of video, it's 716 MB in size, which was the original size of the file. Clearly I've done something stupid, but what?

If anyone can put me right, I'd really appreciate it - I am completely tech-illiterate, so please talk to me as if you were talking to a toddler on this matter! Which buttons to press and in which order would be perfect. Sorry to bother you!