HarmonyOS 关于video组件的问题

横屏全屏播放，在调用requestFullscreen方法的时候可以调用一下横屏方法，是样机横屏播放就可以了，横屏代码如下：

let windowClass: window.Window | undefined = undefined;
let orientation = window.Orientation.LANDSCAPE;
try {
  window.getLastWindow(getContext(), (err: BusinessError, data) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to obtain the top window. Cause: ' + JSON.stringify(err));
      return;
    }
    windowClass = data;
    windowClass.setPreferredOrientation(orientation, (err: BusinessError) => {
      const errCode: number = err.code;
      if (errCode) {
        console.error('Failed to set window orientation. Cause: ' + JSON.stringify(err));
        return;
      }
      console.info('Succeeded in setting window orientation.');
    });
    console.info('Succeeded in obtaining the top window. Data: ' + JSON.stringify(data));
  });
} catch (exception) {
  console.error('Failed to obtain the top window. Cause: ' + JSON.stringify(exception));
}；

第二个问题，VideoController调用requestFullscreen开启全屏播放后，这边的video自带的全屏功能不能自定义设置控件。

第三个问题，由于调用requestFullscreen开启全屏播放后，不能自定义设置设置控件。

针对VideoController调用requestFullscreen开启全屏播放后，这边的video自带的全屏功能不能自定义设置控件这个问题，可以给视频展示区一个高度，通过调整尺寸实现全屏的效果，同时也可以显示自定义的播放控件，提供一个demo参考：

@Entry
@Component
struct VideoPlayerPage {
  @State videoSrc: Resource = $rawfile('videoTest.mp4')
  @State previewUri: Resource = $r('app.media.background');
  controller: VideoController = new VideoController();
  @State curRate: PlaybackSpeed = PlaybackSpeed.Speed_Forward_1_00_X
  @State fullHeight: Length = 600
  @State isFullScreen: boolean = false
  build() {
    Column() {
      Stack({ alignContent: Alignment.Bottom }) {
        Video({ src: this.videoSrc, previewUri: this.previewUri, controller: this.controller })
          .width('100%')
          .height(this.fullHeight)
          .loop(false)
          .objectFit(ImageFit.Contain)
          .autoPlay(false)
          .controls(false)
        // 自定义控制器
        Row() {
          Text('start')
            .onClick(() => {
              this.controller.start() // 开始播放
            })
            .margin(5)
            .fontColor(Color.White)
          Text('pause')
            .onClick(() => {
              this.controller.pause() // 暂停播放
            }).margin(5)
            .fontColor(Color.White)
          Text('0.75')
            .onClick(() => {
              this.curRate = PlaybackSpeed.Speed_Forward_0_75_X // 0.75倍速播放
            })
            .margin(5)
            .fontColor(Color.White)
          Text('1')
            .onClick(() => {
              this.curRate = PlaybackSpeed.Speed_Forward_1_00_X // 原倍速播放
            })
            .margin(5)
            .fontColor(Color.White)
          Text('2')
            .onClick(() => {
              this.curRate = PlaybackSpeed.Speed_Forward_2_00_X // 2倍速播放
            })
            .margin(5)
            .fontColor(Color.White)
          Text(this.isFullScreen ? '退出全屏' : '全屏')
            .onClick(() => {
              if (this.isFullScreen) {
                this.fullHeight = 600
              } else {
                this.fullHeight = '100%'
              }
              this.isFullScreen = !this.isFullScreen
            })
            .fontColor(Color.White)
        }
        .zIndex(1)
      }
    }
    .width('100%')
    .height('100%')
    .justifyContent(FlexAlign.Center)
  }
}