<iframe width="560" height="315" src="https://www.youtube.com/embed/nMVJxTcU8Kg" frameborder="0" allowfullscreen></iframe><div class="embed-responsive embed-responsive-16by9">
<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/nMVJxTcU8Kg" frameborder="0" allowfullscreen></iframe>
</div>
$('body').keydown(function(e) {
console.log(e.which);
if (e.which == 8) {
$('#list li:last-child').remove();
}
});