I have adds blocked on all my systems. The optimal size for maximum adds is 10 minutes on you tube. For hte first 4 minutes she spoke about the existence of an issue, but didn't specify exactly what it was until 4 mins in. Whenever I see this sort of thing I drop all possibly credibility, because if someone is serious about an issue they start with it in the open. Or even put it in the title of the video. You could call the title on this video click bait. We used to live in a world of direct information. Now (at least according to my wife), you can't even get recipes without getting paragraphs of texts about someone life story that no one except useless people care about.