some tools...

zoomit is the one for screen annotation and tracking/zooming- bunch of youtube vids on it as well. http://technet.microsoft.com/en-us/sysinternals/bb897434

http://www.google.com/search?q=youtube%3A+zoomit&rls=com.microsoft:en-us:IE-Address&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7GZBN_enUS448

The monitor software is yawcam (yet anoter webcam...) http://www.yawcam.com/

and the video is http://www.youtube.com/watch?v=hVNrkXM3TTI

I'm pretty excited about combining these tools to make a nice single video with multiple inputs.

The recording software i showed you was called screencastomatic : http://www.screencast-o-matic.com/ and is generally easier to use than i found it to be when i showed you.