Ads may appear next to your uploaded videos even if you haven’t monetized the videos yourself.
If your video contains content to which you don’t own all necessary rights, the rights holder may have chosen to place ads on it. If your videos contain soundtracks from the AudioSwap library or if your content has been verified by Content ID, ads may be displayed.
Become a partner and earn revenue from advertising
We're also expanding the YouTube Partner Program in many countries/regions, allowing more creators to monetize their own content with ads. To become a partner and set up your channel for monetization, follow the instructions here.
Ads are not appropriate for my videos
If you believe ads are inappropriate for your videos, you can opt out of displaying ads from your Video Manager or from your Channel Settings page. Deselect the button next to "Allow advertisements to be displayed alongside my videos".