Video Autoplay Code

 CSS: 

.video-box {
  background: Red;
  width: 600px;
  height: 300px;
}
  
.video-box video {
  width: 300px;
  height: 300px;
  margin: 0px auto;
  display: block;
}

HTML : 

 <div class="video-box">
   <video autoplay muted loop">
     <source src="https://cdn.pixabay.com/vimeo/147055409/social-media-1360.mp4?width=480&hash=bf66260fbd4b8b3d5e6302072129e16844325036" type="video/mp4">
   </video>
 </div>

JavaScript: