In-Banner Video (IBV)
In-banner video ads are video ads triggered within a standard display banner ad on a webpage. They usually follow standard Interactive Advertising Bureau (IAB) banner sizes (e.g., 300 x 250).
In-banner video ads are blocked by default on Ad Exchange and are only allowed on an impression if the AdX publisher has opted in to specifically allow in-banner video ads to run on their inventory. Your bidder can identify if an impression does not allow in-banner video ads if the excluded_attribute field in the Bid Request includes "VideoTypes: In-Banner Video (Publisher Blockable)".