This recipe is going to walk you through some of the basic features of the free Windows Live Movie Maker software. Windows Live Movie Maker is the new version of Windows Movie Maker.
30 minutes or so depending on the length of the video you want to make.
You can always test the file after editing or updating it to see if your video works the way you wanted it.
If the client wants you to create their own procedure for this, then create your own procedure. If you have specific instructions from your client, make sure you also document that.