Meta Business Help Centre
About Facebook in-stream ads

In-stream ads are image or video ads that play before, during or after your videos that can help you earn money on Facebook.
If you have a Page, you can manage in-stream ads in Meta Business Suite. If your profile has professional mode turned on, you can manage in-stream ads in the professional dashboard. You can place ads in specific videos or turn on in-stream ads for all of the videos on your Facebook Page or profile in professional mode.
If you've set up in-stream ads, and you need help, contact us.