Delivery methods value 3 means Download

When to send it

Send 3 when the player downloads the entire ad file before it plays, for example to cache ads for offline playback or to guarantee smooth playback on poor connections. It entered the list in OpenRTB 2.4.

Buyers can return the same file types as for 2 but should expect the file to be fetched ahead of playback, sometimes well before the impression. It is confused with 2: both fetch a file over HTTP, but 3 means nothing plays until the download completes.

Example

{
  "imp": [
    {
      "audio": {
        "delivery": [
          3
        ]
      }
    }
  ]
}

Fields that carry it

• imp.audio.delivery
• imp.video.delivery

Other values in delivery methods

The delivery methods list page explains the whole list and its common mistakes.