template_ad_operation = {
    :operator => 'ADD',
    :operand => {
      :ad_group_id => ad_group_id,
      :ad => {
        :xsi_type => 'TemplateAd',
        :template_id => 13,
        :dimensions => {
          :width => 300,
          :height => 250
        },
        :name => 'Mars cruise video ad #%s' % (Time.new.to_f * 1000).to_i,
        :url => 'http://www.example.com',
        :template_elements => [{
          :unique_name => 'adData',
          :fields => [
            {
              :headline => 'Test Promoted Video',
              :description1 => 'this is a test of video promotion',
              :description2 => 'with a second line of description',
              :video_id => video_id,
              :channel_name => '',
              :image_url => image_url
            }
          ]
        }]
      }
    }
  }