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Video capturing and editing courses
Once you choose the software you have access too (adobe premiere or sony vegas for example), hundreds of follow along tutorials on youtube. Is just a matter of following instructions on the video, and practicing on your own; as you have more complicated questions, you can look for forums specific to the software (mentioned) above, and plenty of people who point you in the right direction on how to achieve something with the software. Fast track yourself by doing youtube tutorials. There are enough to get you started.