
<div><style> 
#example1 {
  border: 2px solid lightgray;
  padding: 10px;
  border-radius: 25px;
   box-shadow: 5px 10px;
}

</style></div>
<iframe id="example1" title="Lecteur vidéo YouTube" src="https://www.youtube.com/embed/SlkEN0CojaM?autoplay=1&amp;loop=1&amp;playlist=SlkEN0CojaM" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe>