You can easily add YouTube videos to the manage assets to show them through the video pane.

  • Go to the back end of your website and click Content > manage assets. On the top left, click Add File.
  • In the following window you specify what type of file you add to the media library
  • Select "Video"
  • Then select "Video hosted on Youtube"
  • Copy the URL or unique ID of the video. The unique ID will be found in the video URL    
  • Then you can select the video when placing a video pane