plcmt 8 means Squeezeback
Added in AdCOM 1.0-202607. The program shrinks to share the screen with the ad and is not covered.
When to send it
Send 8 when the program keeps playing in a reduced frame and the ad fills the space freed around it, often in an L shape or a double box. The ad never sits on top of the picture, and that is what separates it from an overlay. Like 7, it runs during programming rather than in a break, and it was added in AdCOM 1.0-202607.
The screen geometry goes in Video.pos, which gained matching values in the same release, including 12 (Double box), 13 (Double box with background), 16 (L shape), and 17 (Reversed L shape). Buyers need creative built for the exact shape, so squeezeback is usually sold with tight format specifications. It is confused with 7 (Overlay), and with an ordinary break: if the content stops while the ad plays, it is not a squeezeback.
Example
{
"imp": [
{
"video": {
"plcmt": 8
}
}
]
}Fields that carry it
Other values in plcmt subtypes (video)
| Value | Name |
|---|---|
1 | Instream |
2 | Accompanying Content |
3 | Interstitial |
4 | No Content/Standalone |
5 | Pause |
6 | Screensaver |
7 | Overlay |
9 | In-scene |
The plcmt subtypes (video) list page explains the whole list and its common mistakes.