Ehhh. I think that's a little bit different. In those cases they're taking analogue video and just "making it sharper." Analogue cameras pick up a lot more detail than are displayed on TVs, this is why we can make film (analogue) look sharper or find details. So what's done in video analysis is no different than what happens between a movie going from videotape to DVD or BD the image is sharpened and details are found/made cleaer.
What they do on CSI, however, is way over the line of what even this does. But usually there's more on a videotape than what is usally seen onthe best TV it just takes a computer to find and bring out that detail but even then there's still limits.