YouTube was sued by Viacom, and Paramount I believe, with some support given by Universal. Mind you this happened after content ID was in place, but was limited

YouTube was sued by Viacom, and Paramount I believe, with some support given by Universal. Mind you this happened after content ID was in place, but was limited to content that came before. Viacom ended up settling while appealing the decision from the Court of Appeals. It seems clear from the opinion that Content ID itself was evidence YouTube was actively collaborating with content creators. The court believed creation of that collaboration was the intent of the DMCA takedown process. It doesn’t seem like something they could remove without serious repercussion.