How ads show on videos you monetise
When you enable your channel for monetisation, you can turn on ads for your videos. Ads are served through the AdSense auction, Google Ad Manager and other YouTube-sold sources. Once you turn on monetisation, it may take some time for ads to appear.
The ads displayed on your video are automatically determined based on contextual factors, including (but not limited to) your video metadata and whether the content is advertiser-friendly.
We regularly monitor and update our systems to deliver the most relevant ads to your videos. However, we don't manually control all of the ads that appear with your videos, so we can't guarantee that specific ads will be displayed.
Ads will not always appear on videos enabled for monetisation. There may not always be an ad available at the time of viewing. If you think that there's a problem with ads, learn why ads might not be showing on your videos.
What are partner-sold ads?
Since 2010, YouTube has allowed a small number of partners to sell ads for the content that they place on YouTube. These ads are called 'partner-sold ads'. In order to qualify for partner-sold ads, organisations must distribute content across multiple platforms and have the company infrastructure (including sales forces) to sell ads against their own videos.
For partner-sold ads, the partners work directly with advertisers to serve ads on content that they own. Advertisers purchase ads from these partners so that the ads show up on specific content. This means that partner-sold ads may be shown even on videos that YouTube considers to be 'not suitable for most advertisers'. This is because these partners take full responsibility for the ad placement by working directly with the advertisers; they bear the full risk of putting ads on content that advertisers may not think is brand suitable.
Partners cannot sell ads against content that is related to tragedies.