input.video {

width: 235px; 
height: 64px;
background-image:url('images/cms/video.png');
background-repeat:no-repeat;
background-attachment:fixed;
background-position:left; 

}
input.video:hover {

width: 235px; 
height: 64px;
background-image:url('images/cms/video.png');
background-repeat:no-repeat;
background-attachment:fixed;
background-position:right; 

}