Up to 24 hours should be allocated for creative review if you are creating a new TrueView campaign.
- Up to 2 hours
- Up to 12 hours
- Up to 6 hours
- Up to 24 hours
The correct answer is: Up to 24 hours
Explanation: After the initial upload, it takes approximately 24 hours for creative and landing page review. Please wait at least 24 hours after uploading before you contact support.
Read more here: https://support.google.com/displayvideo/answer/6063030