diff --git a/libraries/ortbConverter/processors/video.js b/libraries/ortbConverter/processors/video.js
index b10ad4032c5..caa855566eb 100644
--- a/libraries/ortbConverter/processors/video.js
+++ b/libraries/ortbConverter/processors/video.js
@@ -26,10 +26,6 @@ const ORTB_VIDEO_PARAMS = new Set([
   'playbackend'
 ]);
 
-const PLACEMENT = {
-  'instream': 1,
-}
-
 export function fillVideoImp(imp, bidRequest, context) {
   if (context.mediaType && context.mediaType !== VIDEO) return;
 
@@ -46,10 +42,7 @@ export function fillVideoImp(imp, bidRequest, context) {
       }
       Object.assign(video, format[0]);
     }
-    const placement = PLACEMENT[videoParams.context];
-    if (placement != null) {
-      video.placement = placement;
-    }
+
     imp.video = mergeDeep(video, imp.video);
   }
 }
diff --git a/libraries/video/constants/ortb.js b/libraries/video/constants/ortb.js
index 6b64296500e..86e7b499774 100644
--- a/libraries/video/constants/ortb.js
+++ b/libraries/video/constants/ortb.js
@@ -13,7 +13,8 @@
  * @property {number} w - Width of the video player in device independent pixels (DIPS).
  * @property {number} h - Height of the video player in device independent pixels (DIPS).
  * @property {number|undefined} startdelay - Indicates the offset of the ad placement.
- * @property {number|undefined} placement - Placement type for the impression.
+ * @property {number|undefined} placement - Legacy Placement type for the impression.
+ * @property {number|undefined} plcmt - Modern placement type for the impression.
  * @property {number|undefined} linearity - Indicates if the impression must be linear, nonlinear, etc. If omitted, assume all are allowed.
  * @property {number} skip - Indicates if the player can allow the video to be skipped, where 0 is no, 1 is yes.
  * @property {number|undefined} skipmin - Only ad creatives with a duration greater than this value can be skippable; only applicable if the ad is skippable.
@@ -97,6 +98,18 @@ export const PLACEMENT = {
   INTERSTITIAL_SLIDER_FLOATING: 5
 };
 
+/**
+ * ADCOM - https://github.com/InteractiveAdvertisingBureau/AdCOM/blob/develop/AdCOM%20v1.0%20FINAL.md#list_plcmtsubtypesvideo
+ * @enum OrtbVideoParams.plcmt
+ */
+export const PLCMT = {
+  INSTREAM: 1,
+  ACCOMPANYING_CONTENT: 2,
+  INTERSTITIAL: 3,
+  OUTSTREAM: 4,
+  NO_CONTENT: 4
+};
+
 /**
  * ORTB 2.5 section 5.4 - Ad Position
  * @enum OrtbVideoParams.pos
diff --git a/modules/videojsVideoProvider.js b/modules/videojsVideoProvider.js
index 7764e8af995..efe518ea495 100644
--- a/modules/videojsVideoProvider.js
+++ b/modules/videojsVideoProvider.js
@@ -6,7 +6,7 @@ import {
 } from '../libraries/video/constants/events.js';
 // missing events: , AD_BREAK_START, , AD_BREAK_END, VIEWABLE, BUFFER, CAST, PLAYLIST_COMPLETE, RENDITION_UPDATE, PLAY_ATTEMPT_FAILED, AUTOSTART_BLOCKED
 import {
-  PROTOCOLS, API_FRAMEWORKS, VIDEO_MIME_TYPE, PLAYBACK_METHODS, PLACEMENT, VPAID_MIME_TYPE, AD_POSITION, PLAYBACK_END
+  PROTOCOLS, API_FRAMEWORKS, VIDEO_MIME_TYPE, PLAYBACK_METHODS, PLCMT, VPAID_MIME_TYPE, AD_POSITION, PLAYBACK_END
 } from '../libraries/video/constants/ortb.js';
 import { VIDEO_JS_VENDOR } from '../libraries/video/constants/vendorCodes.js';
 import { submodule } from '../src/hook.js';
@@ -146,8 +146,9 @@ export function VideojsProvider(providerConfig, vjs_, adState_, timeState_, call
     // ~ Sort of resolved check if the player has a source to tell if the placement is instream
     // Still cannot reliably check what type of placement the player is if its outstream
     // i.e. we can't tell if its interstitial, in article, etc.
+    // update: cannot infer instream ever, always need declarations
     if (player.src()) {
-      video.placement = PLACEMENT.INSTREAM;
+      video.plcmt = PLCMT.ACCOMPANYING_CONTENT;
     }
 
     // Placement according to IQG Guidelines 4.2.8
diff --git a/test/spec/modules/videoModule/submodules/videojsVideoProvider_spec.js b/test/spec/modules/videoModule/submodules/videojsVideoProvider_spec.js
index a7379ccbab2..125f608f803 100644
--- a/test/spec/modules/videoModule/submodules/videojsVideoProvider_spec.js
+++ b/test/spec/modules/videoModule/submodules/videojsVideoProvider_spec.js
@@ -6,7 +6,7 @@ import {
 const {VideojsProvider, utils} = require('modules/videojsVideoProvider');
 
 const {
-  PROTOCOLS, API_FRAMEWORKS, VIDEO_MIME_TYPE, PLAYBACK_METHODS, PLACEMENT, VPAID_MIME_TYPE, AD_POSITION
+  PROTOCOLS, API_FRAMEWORKS, VIDEO_MIME_TYPE, PLAYBACK_METHODS, PLCMT, VPAID_MIME_TYPE, AD_POSITION
 } = require('libraries/video/constants/ortb.js');
 
 const videojs = require('video.js').default;
@@ -139,7 +139,7 @@ describe('videojsProvider', function () {
       expect(video.playbackmethod).to.include(PLAYBACK_METHODS.CLICK_TO_PLAY);
       expect(video.playbackend).to.equal(1);
       expect(video.api).to.deep.equal([2]);
-      expect(video.placement).to.be.equal(PLACEMENT.INSTREAM);
+      expect(video.plcmt).to.be.equal(PLCMT.ACCOMPANYING_CONTENT);
     });
 
     it('should populate oRTB Content', function () {
diff --git a/test/spec/ortbConverter/video_spec.js b/test/spec/ortbConverter/video_spec.js
index 8ac6d8b4d08..ab4034bb60a 100644
--- a/test/spec/ortbConverter/video_spec.js
+++ b/test/spec/ortbConverter/video_spec.js
@@ -30,7 +30,6 @@ describe('pbjs -> ortb video conversion', () => {
           h: 2,
           mimes: ['video/mp4'],
           skip: 1,
-          placement: 1,
         },
       },
     },