.st-video-popup .vc_figure { 
  position: relative; 
}

.st-video-popup .box {
    position: absolute;
    bottom: 30px;
    right: 4px;
    width: 36px;
    height: 36px;
    border: none;
    cursor: pointer;
    z-index: 1;
    color: #fff;
}

.st-video-popup .tri {
    position: relative;
    top: 16%;
    left: 20%;
    border-top: none;
    border-bottom: none;
    border-left: none;
}

.st-video-popup .tri:after {
    content: "\e91e";
    font-family: 'icomoon' !important;
    font-size: 24px;
}

.box {
    position: relative;
    z-index: 0;
}

.box:before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #282e3f;
    transform: scaleX(0);
    transform-origin: 0 50%;
    transition: transform .3s ease-in-out;
}

.box:hover:before {
    transform: scaleX(1);
}