This content is specific to users with a AdSense for YouTube account.
If you're having problems with ads or YouTube ads in general, you can:
It's possible to see ads appearing against your uploaded videos even if you haven't monetised the videos yourself. If your video contains content to which you don't own all necessary rights, the rights holder may have identified their content in your video and chosen to place ads on it.
Learn more about the YouTube monetisation policies.