What software to I need to make a video walkthrough?

I want to make some video tutorials on my computer for my website, but I don't know what software I need to buy or how much it costs. How do I "film" my own gameplay and save it on my laptop? Does anybody know?What software to I need to make a video walkthrough?Hypercam records gameplays. The trial version will leave a logo over screen.What software to I need to make a video walkthrough?This is the best, imho



http://www.techsmith.com/camtasia/