Problème d'affichage

Bonjour,
j'ai des liens de video (lien de video youtube) inserer dans ma bdd. Je voudrais les afficher dans une page de mon site (il est en local pour le moment) mais j'ai une erreur qui s'affiche (Forbidden

You don't have permission to access /ndameyong/<iframe width= on this server.) Pourtant quand je place ces liens dans une simple page les videos s'affichent. J'ai besoin d'assistance
voila le code de la page
videos.php

<?php require 'includes/includes.php' ?>
<?php require 'includes/header.php'; ?>
  

  <?php 
      if(!empty($_POST['cours']) && $_POST['cours'] >0){
          $cours = intval($_POST['cours']);

          $cond= array('cours_id'=>$cours);

          $nbr = $DB->query('SELECT count(*) as nbr FROM videos WHERE cours_id=:cours_id ORDER BY id DESC',$cond);
         
        }else{
          $nbr = $DB->query('SELECT count(*) as nbr  FROM videos ORDER BY id DESC');
          }
        
        $perpage = 15;
        $nbr_pages = ceil($nbr[0]->nbr/$perpage);

        if(isset($_GET['page'])){
          $page = intval($_GET['page']);
           if($page>$nbr_pages){
            $page = $nbr_pages;
            }
        }else{
          $page = 1;
        }

        $premierPage = ($page -1) * $perpage;

    ?>

<!-- message de session -->
<?php if (isset($_SESSION['message'])): ?>
  <div class="message"> <?php echo $_SESSION['message']; ?></div>
  <?php unset($_SESSION['message']) ?>
<?php endif ?>
<?php if (isset($_SESSION['erreur'])): ?>
  <div class="errorMessage"> <?php echo $_SESSION['erreur']; ?></div>
  <?php unset($_SESSION['erreur']) ?>
<?php endif ?>



 <section class="diff-offer-wrapper">
      <div class="container">

        <div class="row">
          <div class="col-sm-4 service-info">
            <div class="item">
      <h2>La liste des leçons
        <?php 
        $cours = $DB->query('SELECT * FROM cours');
         ?>

        <form id="filtre" action="videos.php" method="post">
          <select name="cours" id="cours">
            <option value="0">Tous</option>
           <?php foreach ($cours as $c): ?>
              <option value="<?php echo $c->id ?>"><?php echo $c->name; ?></option>
    
           <?php endforeach ?>
          </select>
          <input type="submit" value="Filtrer">

        </form>
      </h2>



     <?php 
      if(!empty($_POST['cours']) && $_POST['cours'] >0){
          $cours = intval($_POST['cours']);

          $cond= array('cours_id'=>$cours);

          $videos = $DB->query('SELECT  * FROM videos WHERE cours_id=:cours_id ORDER BY id DESC  LIMIT '.$premierPage.','.$perpage.'',$cond);
         
        }else{
          $videos = $DB->query('SELECT * FROM videos ORDER BY id DESC   LIMIT '.$premierPage.','.$perpage.'');
          
        }

      ?>

      <?php 
   /*   $produits = $DB->query('SELECT * FROM products ORDER BY id DESC  LIMIT 15');*/
       ?>

      <ul class="videos">
      <?php foreach ($videos as $video): ?>
          <li>
          <a href="video.php?id=<?php echo $video->id ?>">
            <iframe src="<?php echo $video->lien_youtube ;?>" alt="<?php echo $video->name; ?>"></iframe>
            <h4><?php echo $video->name; ?></h4>
           
          </a>
          
        </li>
      <?php endforeach ?>

        
      </ul>
      <?php if($nbr_pages >1): ?>
      <div class="pagination">
        <ul>
        <?php 
       
          for ($i=1; $i<= $nbr_pages; $i++){
            if($i == $page){
              echo '<li class="active"><a href="">'.$i.'</a></li>';
            }else{
              echo '<li><a href="videos.php?page='.$i.'">'.$i.'</a></li>';
            }
          }
         ?> 
        </ul>
      </div>
      <?php endif ?>

              </div>
            </div>
          </div>
      </div>
</section>

<?php require 'includes/footer.php'; ?>