<div class="youtube-re">
<iframe width="630" height="355" src="https://docs.google.com/presentation/d/e/2PACX-1vRtL8wiUF52XlGfpMQDZP4QpxhJ2m-rklyRPwnid8Gn9vekoV_048SSvx6Qy4fDqvLFrniFMsqwqJcY/embed?start=true&loop=true&delayms=3000" frameborder="0" allowfullscreen></iframe>
</div>
<style>
.youtube-re{
position: relative;
overflow: hidden;
margin: 15px 0 20px 0;
padding-bottom: 50%;
padding-top: 65px;
}
.youtube-re iframe {
width: 100%;
height: 100%;
position: absolute;
top: 0;
left: 0;
}
</style>