How do they pick those highlights?

So how do to topical talk-shows get those clips from news shows? In Holland, the public broadcaster VARA has what they call a Zap Service in the Paul and Witteman talk show. Seem they do it by having people watch the TV all evening in the hope of coming up with something. That explains why it is often very hit and miss.

Whereas in the US, shows like The Daily Show use a special server and video search software to find exactly where in the transmission something was said. Does it work better? Yes, it's a breeze. Also for media companies paid to check whether commercials were broadcast when they said they were.