Actually, advertisers can't pay for adverts on anything vaguely political or controversial on YouTube full stop. Google won't let them, because the headlines in

Actually, advertisers can't pay for adverts on anything vaguely political or controversial on YouTube full stop. Google won't let them, because the headlines in the press about <big brand> funding <terrifying-sounding characterisation of some obscure video> have cost them probably somewhere in the ballpark of a billion dollars as advertisers get scared and pull ads from YouTube as a whole. It's probably only a matter of time before the press figure out how to frame this in a way that forces them to pull the videos altogether.