Multiple videos in one request.

[Azhiya]

Can you detail the features of VAST 4.1 video ad plug-in?

Verification: Changes that enable verification to be supported in a non-VPAID architecture (separated from media file). Also includes changes necessary to work with Open Measurement.

Digital Audio Ad Serving Template (DAAST): With VAST 4.1, DAAST has been merged into VAST.

Ad Requests: VAST is a response protocol. 4.1 now includes a basic Ad Request specification, based on macros.

Server-Side Ad Insertion (SSAI) related changes: VAST 4.1 includes minor changes to how headers should be handled.

Deprecating Video Player Ad-Serving Interface Definition (VPAID): With VAST 4.1 we are taking the first steps to officially deprecate the use of VPAID.

AdServingID: A field to simplify comparing data about a video impression across the various systems involved with the delivery and tracking of the impression.

VAST Interactive Templates: Address the need for interactive ads without ad delivered executable code.
Closed Captioning: Standardizing the delivery of Closed Captioning files.