In the upcoming months, Display & Video 360 instant reports will be made available using the Bid Manager API. We previously announced the migration  of certain report types from Offline Reporting  to Instant Reporting .
Once a partner is migrated, they will see the following changes:
Instant reports will be included in queries.list  Existing Standard, Reach, YouTube, and URA reports will only be available under the Instant Reporting  tab in the Display & Video 360 interface under the same query and report IDs.
 If you use the Display & Video 360 interface to build new reports, you will need to build Standard, Reach, YouTube, and URA reports under the Instant Reporting  tab.  
This migration will happen by partner throughout the following months, with all reports under a partner migrated at once.
If you have questions about this migration in general, you can contact Display & Video 360 product support using this contact form . If you have questions about how this migration will impact the API, please contact us using our new Bid Manager API Technical support contact form .