Third Party Tags and Pixels Implementation Request
Last January it was announced that YouTube will move away from using third-party ad tracking pixels.
Starting May 2018, YouTube will only allow pixels from, or that make fourth-party calls to, the following vendors: comScore, DoubleVerify, IAS, Kantar (including Millward Brown Digital), Moat, Nielsen, Research Now, and Google (including DoubleClick).
As of May 1, 2018 AdWords will stop accepting new third-party ad tracking pixels that are not from one of these vendors or that make fourth-party calls to other vendors.
The AdWords team is taking steps to ensure that existing ads comply with this new policy. Learn more about how to ensure that your existing ads comply with this new policy.