Their content matching system came about in the middle of a billion dollar lawsuit from Viacom. Given that youtube was full of Viacom's assets (such as videos o

Their content matching system came about in the middle of a billion dollar lawsuit from Viacom. Given that youtube was full of Viacom's assets (such as videos of The Daily Show and The Colbert Report) I find it hard to classify such a lawsuit as 'frivolous'. Which makes more sense, youtube implementing a content matching system and running it on all of the videos uploaded or Viacom and every other copyright holder making their own systems (or buying into one) that tries to go through every video uploaded to youtube?