For video ad campaigns that include an In-Stream Ad and one or more Companion Ads, the In-Stream portion of the ad unit is referred to as the Master Ad. In this master-companion relationship, the master ad must always be shown.
For video ad campaigns that include an In-Stream Ad and one or more Companion Ads, the In-Stream portion of the ad unit is referred to as the Master Ad. In this master-companion relationship, the master ad must always be shown.