Regarding the suit against YouTube brought on by Viacom (MTV, Paramount Pictures, Nickelodeon and Comedy Central, etc.), Larry Neumeister from the Associated Press writes: "YouTube didn't say exactly what it intended to gain from questioning the Comedy Central comedians. Colbert hosts "The Colbert Report," a spin-off of "The Daily Show," which is hosted by Stewart."
It seems clear to me that YouTube would like the court to hear Stewart and Colbert's perception of the harm vs. gain argument. It's hard to imagine that the widespread distribution of the Daily Show on YouTube could harm or take away from the show's value compared to the massive PR gain that drives traffic back to their program along with elevating their cultural relevance.