What so interesting about this episode isn't that The Daily Show nailed Sean Hannity. That's what they do. What's interesting is that Hannity backed down and appologized, even if it was a half-ass effort. Hannity is just a dick in everything he says, isn't he?
I figure, FoxNew's mission is to be an inflitrator in the fourth estate. It has to look like a real news organization, otherwise it can't function. So if its cautgh doing something so blatant, like using protest fotage from the another day, that completely destroys that thin illution of a real new org, it has to walk it back. Only enough to keep its cover intact.