.itdetailvd a.clpopvideo::before{
    content: '';
    position: absolute;
    left: 20px;
    top: 20px;
    z-index: 1;
    width: 50px;
    height: 50px;
    background-image: url('../images/iplay.png');
    background-position: center;
    background-repeat: no-repeat;
    background-size: 100% 100%;
    animation: pulse_toa 2s infinite;
    border-radius: 100%;
}