It's been lean times for some of YouTube's most popular video producers. In the last two weeks ad rates have gone down as much as 75 percent. The producers are caught up in a struggle between advertisers and YouTube over ad placement.
In recent weeks, reports showed ads from major brands placed with extremist and anti-Semitic videos. Companies such as General Motors, Audi and McDonald's pulled out of YouTube. That means there's less money for everyone.
Now YouTube is trying to convince these companies to come back. And that's meant adjusting the algorithm that places ads.