playbackmethod 2 means Initiates without any specific user interaction Sound Off by Default

When to send it

Send 2 when the ad starts without user action but muted. Browsers block audible autoplay by default, so muted autoplay is common on the web, and many in-app feeds behave the same way. The value was Auto-Play Sound Off in OpenRTB 2.0 to 2.4, OpenRTB 2.5 tied it to page load, and AdCOM 1.0-202607 removed the page-load wording.

Buyers price 2 below 1 because the viewer may never hear the ad. Under the current plcmt definitions, a player whose first method is 2 usually does not qualify as Video.plcmt 1 unless the viewer clearly chose to watch. It is confused with 6, which is also muted but starts only when the player enters the viewport, and with 1.

Example

{
  "imp": [
    {
      "video": {
        "playbackmethod": [
          2
        ]
      }
    }
  ]
}

Fields that carry it

• imp.video.playbackmethod

Other values in playback methods

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