.play-button {
    width: 68px;
    height: 48px;
    cursor: pointer;
    background-color: #212121;
    box-shadow: 0 0 30px rgba( 0, 0, 0, 0.6);
    z-index: 1;
    opacity: 0.8;
    border-radius: 7px;
    transition: all .25s cubic-bezier(0.0, 0.0, 0.2, 1);
}

.play-button:hover {
    background-color: #3c91e6;
    opacity: 1;
}

.play-button:before {
    content: "";
    border-style: solid;
    border-width: 10px 0 10px 16.0px;
    border-color: transparent transparent transparent #fff;
}

.play-button,
.play-button:before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate3d( -50%, -50%, 0);
}

.video-container {
    position: relative; /* context for thumbnail */
    padding-top: 56.25%; /* 16x9 aspect ratio box */
    overflow: hidden;
}

.video-container .placeholder {
    margin-top: -9.5%;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    /* min-height required so that the browser knows it will be displayed
    and actually trigger the lazy GET request */
    min-height: 100%
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2; /* ensure iframe is on top regardless of html order */
}