playbackend 2 means On Leaving Viewport or when Terminated by User
Playback stops when the player leaves the viewport or the viewer stops it.
When to send it
Send 2 when the player pauses or ends the ad once it scrolls out of view, as well as on user action. Article players that do not float, and feed units that pause off screen, are the typical cases.
Buyers like 2 for viewability, since the ad does not play unseen, but completion rates drop as readers scroll on. It usually comes with Video.playbackmethod 5 or 6 and Video.plcmt 2 or 4. It is confused with 3, which keeps the ad playing in a floating player, and with 1, which ignores the viewport.
Example
{
"imp": [
{
"video": {
"playbackend": 2
}
}
]
}Fields that carry it
Other values in playback cessation modes
| Value | Name |
|---|---|
1 | On Video Completion or when Terminated by User |
3 | On Leaving Viewport Continues as a Floating/Slider Unit |
The playback cessation modes list page explains the whole list and its common mistakes.