Jing can be used to capture video and stills from your desktop computer. It is a free application. Onee of the limitations of the software is that you are limited to exporting video as an SWF.
It is easy to use. You can go to website and download the application for free. Once it is loaded and you launch the program, you will see a semitransparent yellow circle at the top right of your screen. One of the limitations of Jing is that it only exports SWF files, but SWF files can be converted into video files. We show you how here.