VideoController如何控制子组件中的视频播放

@Component 
export struct AdVideo { 
  @Prop controller: VideoController | undefined 
  @Prop previewUri: string 
  @Prop src: Resource 
 
  build() { 
    Column() { 
      Video({ 
        src: this.src, 
        previewUri: this.previewUri, 
        controller: this.controller 
      }) 
        .controls(true) 
        .objectFit(ImageFit.Auto) 
        .autoPlay(true) 
    } 
  } 
} 
 
//组件的使用 
import { AdVideo } from './ADVideo'; 
 
@Entry 
@Component 
struct Index { 
  @State message: string = 'Hello World'; 
  controller: VideoController = new VideoController() 
 
  build() { 
    Row() { 
      Column() { 
        Video({ 
          src: $r('app.media.video5'), 
          previewUri: "", 
          controller: this.controller 
        }) 
          .autoPlay(true) 
          .width("100%") 
          .height("40%") 
        AdVideo({ 
          src: $r('app.media.video5'), 
          previewUri: "", 
          controller: this.controller 
        }) 
          .width("100%") 
          .height("40%") 
        Text("暂停") 
          .fontSize(50) 
          .onClick(() => { 
            this.controller.pause() 
          }) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}