如何在videojs中实现Google IMA？

<video id="my-video" class="video-js" controls>
  <source src="video.mp4" type="video/mp4">
</video>

var player = videojs('my-video');

player.ima({
  id: 'my-video',
  adTagUrl: 'https://ad.doubleclick.net/ddm/pfadx/N123456.1234567890EXAMPLE/B12345678.1234567890EXAMPLE;sz=640x480;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;tfua=;dcmt=text/xml',
  debug: true
});

player.ima({
  id: 'my-video',
  adTagUrl: 'https://ad.doubleclick.net/ddm/pfadx/N123456.1234567890EXAMPLE/B12345678.1234567890EXAMPLE;sz=640x480;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;tfua=;dcmt=text/xml',
  debug: true,
  timeout: 5000,
  prerollTimeout: 1000,
  adLabel: '广告',
  adsRenderingSettings: {
    restoreCustomPlaybackStateOnAdBreakComplete: true
  }
});

player.ready(function() {
  player.ima.initializeAdDisplayContainer();
});