<script src='//ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js' type='text/javascript'></script>

<!-- Demo mẫu khi viết bài 

​

<youtube>id_video</youtube>

​

-->

<center>Video 1</center>

<youtube>MhQKe-aERsU</youtube>

​

<center>Video 2</center>

<youtube>60ItHLz5WEA</youtube>

<style>.youtube-wrap{width:100%;max-width:650px;margin:15px auto}

.youtube-inner{position:relative;padding-bottom:43%;padding-top:0;height:0;overflow:hidden;border-image:url('https://i.imgur.com/TktXOMG.png') 50 233 112 228 stretch stretch;border-color:rgba(0,0,0,0);border-width:27px 76px 55px 76px;border-style:inset}

.youtube-inner iframe,.youtube-inner object,.youtube-inner embed{position:absolute;top:0;width:100%;height:100%;background-color:#ddd}

youtube{visibility:hidden}

youtube div{visibility:visible}

@media all and (max-width:500px){.youtube-inner{border-width:20px 62px 40px 62px}}

@media all and (max-width:400px){.youtube-inner{border:none!important}}</style>

<script>$("youtube").each(function(){

    $(this).append('<div class="youtube-wrap"><div class="youtube-inner"><iframe width="560" height="315" src="https://www.youtube.com/embed/'+ $(this).text() +'?rel=0&theme=dark&controls=1&showinfo=0&autohide=0" frameborder="0" allowfullscreen=""></iframe></div></div>'); 

});</script>