@media (max-width: 700px)
 {
     #content_ 
     {
         width:100% !important;
     }
     .video-container {
        position: relative;
        padding-bottom: 65.25%;
        padding-top: 35px;
        margin-left:5px;        
        margin-right:5px;
        height: 0;
        overflow: hidden;
    }
    
    .video-container iframe {
        position: absolute;
        top:0;
        left: 0;
        width: 100%;
        height: 100%;
    }        
 }
 
  @media (min-width: 701px)  {
    .video-container iframe
    {
        width:480px;
        height:400px;
    }
 }