Animated Movie Help

I feel kind of stupid, nooby and mingebaged about asking this but here goes…
I was wondering how do you make animated movies for garry’s mod so that it can be put up on youtube, all I have is hypercam. The hypercam that I have doesn’t record a single sound from my computer. Do I need a different screen recorder.
I also am having trouble trying to figure out how to form the clips I recorded into one whole scene so I can make an actual movie, all I have is Windows movie maker.

Best screen-cap programs are WeGame, Fraps and Source Recorder (in-game).
Windows Movie Maker works fine, but I would recommend Sony Vegas Pro, as its not as limited.