Editing of a camtasia captured video

We have captured a version of a walk through of our software (see http://www.youtube.com/watch?v=Lt1wBvL6uLk as an example). We want to shorten and professionalise the video in the embedded clip to around 3 - 5 minute as well as produce 3 more examples (we will again be able to provide raw footage of the video in a format camtasia can output.

We will provide 4 separate raw footage videos along with brief narrative.

We want 4 separate 3 - 5 minute videos