You could try to find a tool that can be cracked or you can find an serial easy.But some of them are free , like Wink . Made by Debugmode and you can do all with it: Static capture,motion capture , voice recording or all of them at a time.
Download it from here : http://www.debugmode.com/wink/download.php
There are some useful links and tutorials on the link above.
Some interesting facts are: you can merge 2 or more projects , or you can first record the images or video and then you can insert the voice or other bubbles to mark some interesting points.
Have fun presenting !