Из релиза от мая:
"As of May 21, 2018, only a small group of vendors are certified for measurement on YouTube: comScore, DoubleVerify, IAS, MOAT, Nielsen, Kantar, Research Now, and Google (including DoubleClick). For TrueView ads, Bid Manager no longer accepts third-party ad tracking pixels that are not from one of these vendors or that make unapproved fourth-party calls to other vendors."