[A good Website I have read]----How to Make a Comedy Movie(3)

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  Edit the film. Most newer computers come with video editing software pre-installed. This software allows you to edit your film by importing the scenes you’ve shot and cutting and pasting them together in the order you desire. Unless you’ve shot directly onto a DVD, however, you will need to either connect your camera to your computer via a USB or firewire cable, or take it to a lab to be transferred to the proper medium.
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  Add music. You can also use the editing software to add the tracks you want to use. If you recorded the dialogue separately, you will need to add it in this step as well. Just make sure that the music fits the tone of your comedy. You don’t want dark and ominous unless your making a dark comedy. If you are making a dark comedy, you don’t want light and goofy. This final step can make a huge difference in the impact of your film.

from: http://www.ehow.com/how_6729933_make-comedy-movie.html