Microsoft Monetize - Video completion rate targeting

You can opt to buy only video impressions that are predicted to result in the video being viewed to completion by selecting the Video Completion Rate Threshold checkbox in the Viewability & Environment Targeting section and entering a percentage value. For a standard line item, this setting is located in the Targeting settings.

Microsoft Advertising collects historical information about video completion in order to predict the probability that a particular video creative will be played to completion.