You want to run your campaign for your dry-cleaning service across three different publishers, each with different video creative specifications. One accepts 300x250-only companion ads, one requires VAST and vPaid tags, and the third hasn't sent specifications. How should you traffic this campaign to meet these demands?

The Publisher Spec library in Campaign Manager 360 allows you to define specific video creative requirements for each publisher. This feature enables automatic transcoding of your video assets to meet the diverse specifications of different publishers, including companion ad sizes, VAST/VPAID requirements, and other technical details. By using the Publisher Spec library, you can efficiently manage and deliver the correct video format to each publisher without manual adjustments for every creative. Using only one placement for all three publishers would not work because the creative specifications are different. Waiting for all publishers to have the same specifications or to provide them is impractical and delays campaign launch; the Publisher Spec library is designed to handle these variations.