playAds () {
    try {
      this._onMediaVolumeChange()

      if (!this.displayContainerInitialized) {
        // Initialize the container. Must be done through a user action on mobile
        // devices.
        this.displayContainer.initialize()
        this.displayContainerInitialized = true
      }

      const { player } = this
      const viewMode = this.isFullScreen()
        ? google.ima.ViewMode.FULLSCREEN
        : google.ima.ViewMode.NORMAL

      // Initialize the ads manager. Ad rules playlist will start at this time.
      this.adsManager.init(player.sizeInfo.width, player.sizeInfo.height, viewMode)
      this.adsManager.start()
    } catch (adError) {
      this._handleAdError(adError)
      this._resumeContent()
    }
  }
Handles the ad manager loading and sets ad event listeners.
@param {!google.ima.AdsManagerLoadedEvent} ev
@private