cforge-2.0.x-dev/src/Plugin/Block/SelPromo.php

<?php

namespace Drupal\cforge\Plugin\Block;

use Drupal\Core\Block\BlockBase;
use Drupal\Core\Render\Markup;

/**
 * Provides french promotional video for the public
 *
 * @Block(
 *   id = "sel_promo_block",
 *   admin_label = @Translation("SEL promo (French)"),
 *   category = @Translation("Hamlets")
 * )
 */
class SelPromo extends BlockBase {

  /**
   * {@inheritdoc}
   */
  public function build() {
    $html = '<iframe width = "100%" height = "184" src = "http://www.youtube.com/embed/En1RWomDFgI" frameborder = "0" allowfullscreen></iframe>';
    return new Markup($html);
  }

}