Those cool, fancy images are all over the Internet. Many people call them HDRI (High Dynamic Range Images), although they usually are not, at least not originally.
For quite some time creating proper video-tutorials with Linux wasn't very comfortable.
I tried it with Cinelerra before, but since it's a fully featured video-editor it's too blown up for this simple task. Other solutions, like for example VNC2SWF only record video, but no sound.