Primitive appearance define video material error

CesiumJS
1

i want use “primitives” add rectangle,not use “entities” add rectangle.because “entities” no “modelMatrix” property. so primitive appearance how to define video material .

var videoElement = document.getElementById(‘trailer’);

function createPrimitives() {

let instance = new Cesium.GeometryInstance({

id: ‘go’,

geometry: new Cesium.RectangleGeometry({

rectangle: Cesium.Rectangle.fromDegrees(-30, -10, 30, 10),

                vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,

//vertexFormat: MaterialAppearance.MaterialSupport.TEXTURED.vertexFormat

}),

attributes: {

//color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.RED)

}

});

scene.primitives.add(new Cesium.Primitive({

geometryInstances: instance,

appearance: new Cesium.MaterialAppearance({

                material: videoElement

}),

releaseGeometryInstances: false,

}));

}

An error occurred while rendering. Rendering has stopped.

TypeError: this.material.isTranslucent is not a function

TypeError: this.material.isTranslucent is not a function

at p.s.isTranslucent (http://localhost:51309/Build/Cesium/Cesium.js:477:8801)

at V.update (http://localhost:51309/Build/Cesium/Cesium.js:483:17425)

at a.update (http://localhost:51309/Build/Cesium/Cesium.js:493:10489)

at nt (http://localhost:51309/Build/Cesium/Cesium.js:528:17162)

at et (http://localhost:51309/Build/Cesium/Cesium.js:528:14874)

at Je (http://localhost:51309/Build/Cesium/Cesium.js:528:12880)

at dt (http://localhost:51309/Build/Cesium/Cesium.js:528:21418)

at ht (http://localhost:51309/Build/Cesium/Cesium.js:528:21607)

at Ee.render (http://localhost:51309/Build/Cesium/Cesium.js:528:29455)

at A.render (http://localhost:51309/Build/Cesium/Cesium.js:535:9556)

``