Is it possible that it could potentially happen? Yes. This is why we deploy a system like Content ID: we ask rights holders to upload reference files that we can compare. Basically, we have them decide what they want to do to take action against that: whether they want to block it entirely, whether they want to monetize it—in which case the ad revenue is actually diverted to them—or whether they just want to track it.
On October 4th, 2018. See this statement in context.