Define a Video Asset as an Ad or Pre-roll:

To assign a video as a pre-roll sub-asset, it must be defined as an Ad in the Asset Type.

 

1. In the navigation sidebar, go to Assets > All Assets
2. Scroll, search or filter to find the video you want to use as an ad or pre-roll
3. Select the asset to open a preview
4. In the preview panel, check Asset Type

• If it already shows Ad, proceed to Assign an Asset as an Ad or Pre-Roll. 
• If not, click View Details

5. Go to the Metadata tab and click the edit icon ✏️
6. Scroll down to Asset Type and select Ad
7. Click the save icon  💾 to finish