img {
    width: 100%;
}

video {
    width: 100%;
    xwidth: 800px;    
    margin: 0 auto 0 auto;
}

.videoWrapper {
    xbackground: green;
    max-width: 800px;
    margin: 0px auto 0px auto;
    xborder: 1px solid orange;
    width: 80%;
    xheight: 400px;
    height: 70%;
    xmin-height: 500px;
}

@media only screen and (max-width:767px) { 
    .videoWrapper {
       xbackground: green;
       max-width: 600px;
       margin: 0px auto 0px auto;
       xborder: 1px solid orange;
       width: 100%;
       xheight: 400px;
   }
}