I prefer to pick up screen recording software rather than screen capture software. That's a kind of program allows you to record a video but not just take a screenshot.
I used to record my poker gameplay with digital camera but the video quality is blur and doom. By using screen recording software, it's easy to control the video quality in HD and record narration.
I use DemoCreator to make video review on software or desktop tutorial. And there are some of screen recorders like BB Flashback support webcam recording. Both of them have a built-in editor so that you can edit your video review at ease.
Hope this helps.