That's obvious, video header bidding setup is a complex task due to the many different video players publishers use. While serving video advertisement the wrapper should take care not only about auction mechanic but also about putting all parts together: publishers' ad server, VAST cache server, video player integration, passing the winning bid over this way as well as keeping statistical records. HeadBidder.net does that via integration with GAM and Prebid Server in a single easy-to-use UI.
It often comes that video player and banner ad spots put on the same web page, that's usual and normal. HeadBidder wrapper makes a distinction between that advertisement flows and, while creating orders in GAM ad server via API, creates different Line Items for banner and video ads. It allows serving ads using single wrapper as well as making price granularity setup properly in terms of ad types.