VideoScribe from Sparkol
This is amazing product is the latest addition to the 2 niner niner 2 toolbox of content creation apps.
Here is a very quick and extremely simple example of what can be done. It should be noted that the circle and check mark graphics, along with the 2 niner niner 2 logo, were added in Camtasia Studio 8 from which the final MP4 file was generated. The output from VideoScribe is in the MOV format and was 11.4 MB in size. The MP4 from Camtasia Studio 8 is 1.1 MB. Quite a bit of difference.
Oh yeah, there is audio, so turn on your speakers or plug in your headphones.
Also, this is my personal opinion – your mileage may vary 🙂