.video_play{
    background: url('/upload/icon_play.png') no-repeat;
    width: 70px;
    height: 70px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -50px 0px 0px -50px;
    cursor: pointer;
}
.tile-item .video_play{
    width: 50px;
    height: 50px;
    margin: -25px 0px 0px -25px;
    background-size: 100%;
}