diff --git a/src/r3-ar.js b/src/r3-ar.js
index fea5dc2..9b2f60f 100644
--- a/src/r3-ar.js
+++ b/src/r3-ar.js
@@ -317,7 +317,7 @@ R3.AR.prototype.toApiObject = function() {
         this.id,
         this.name,
         R3.Utils.IdOrNull(this.parentEntity),
-        this.video.toApiObject(),
+        R3.Utils.IdOrNull(this.video),
         this.pathCamera,
         this.pathMarker,
         R3.Utils.IdOrNull(this.scene),