You might know that the SlotSize in Google Ad Manager is specified with an additional "v". i.e. "640x480v". In ADvendio, the additional "v” is required when defining slot sizes in all reporting fields associated to video media. For any other process (such as Submit or Forecast), “v” is not required in the slot sizes defined in ADvendio.
For example, if you wish to submit one video-related slot size, submit it as “640x480” from ADvendio. If you wish to receive back reporting data on the performance of a certain video-related slot size, use “800x600v” slot size format in the reporting field from the Ad Type.