I was looking around at what was out there in the marketplace that I could use to create a video for my online communications. I found a great tool called jing. This tool allows you to screen grab whatever you have open on your destkop and make a movie from it. You can add commentary to your slideshare presentation without paying for a licenced copy of a editing package like Camtasia studio.
This tool is awesome. Only down point is it creates a large file. To make this file smaller you need to upgrade from free to a paid subscription and then you can make video footage at a small file size and it can be MP3 compatibale and u-tube ready!
PS you need to subsribe to screencast to upload your files and share them but this is free and easy.