.product-video-thumbnail::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 70px;
    height: 70px;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.65);
    border-radius: 50%;
    z-index: 2;
}

.product-video-thumbnail::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-40%, -50%);
    width: 0;
    height: 0;
    border-left: 20px solid white;
    border-top: 14px solid transparent;
    border-bottom: 14px solid transparent;
    z-index: 3;
}