Thanks for the speaking to us, as the others said. But why keep videos up that do not credit? why not just take them off the page?
It's not that simple. Videos are removed when they dip below a certain performance level. However, there are a lot of variables... some have daily limits, some have limits on how many times they can be repeated, and sometimes those limits can be enforced automatically and sometimes not. It all depends on the ad campaign. So a video may not work for you, but that doesn't mean it wont work for someone else -- or work for you at a different time of day.