{"page":"/blog/dco-html5-creative-pipelines","modified":"2026-11-10","license":"https://creativecommons.org/licenses/by/4.0/","columns":["Feature","VPAID","SIMID"],"rows":[["Where the ad code runs","In the player's page, with access to its DOM","In a cross-origin iframe, no player DOM access"],["Who plays the video file","The creative","The player"],["Communication","Direct function calls","postMessage messages"],["Server-side ad insertion","Not possible","Possible"],["Verification","Done by the creative","Left to Open Measurement"],["Resource MIME type","application/javascript","text/html"]],"sourceUrls":[[],[],[],[],[],[]]}