here is something that i can advice...
the first one is
THIS FREE TOOL. download it and use at any time u need.... nice and easy
there is
another tool for screen recording, its more featured tool, free to try
here is one new...
This one is capturing tool, that allows you to edit your video, add callouts, remarks, etc. In other words to make a good presentation or something like that... And you can publish your file in any video or flash format that you need.
good luck to you