Usually there are two different types of screen recording software. One is based on the time line, one is based on the slides(similar to PowerPoint). Most screen recorders are based on the time line, like Camtasia. *** and Captive are based on the slides. Some applications even allow users to export the selected frame as a picture. It is difficult to say which one is the best, what I am certain is the one fits your needs is the best for you.