I'm looking for a good video tutorial software.

It shouldn't be very complicated.

It should be very easy to zoom in on specific locations on screen, as well as make highlights on screen. I have Camtasia Studio, but can't figure out how to do this. This functionality looks ridiculously complicated. http://www.techsmith.com/learn/camtasia/5/editing/zoom-n-pan.asp

Free is preferred though low cost is OK too.

I have both Mac and Windows.

Thanks