It's easy to use, you only need to charge the file where we want to extract the clip from and choose the start and finish point by using an intuitive bar.
AVI Toolbox allow us to cut and extract only sound, only video or both two. Furthermore you will be able to capture a video frame and export it as BMP.
It doesn't allow you to access advanced setting, that's good and bad at the same time, depending on the kind of user you are, if you are a novice, that's great but if you are an advanced user you'll miss those features.
Nag screen asking you for registry.