#my-video {
    opacity: 0.5;
}

.video-div:hover {
    opacity: 1;
}

.video-div {
    position: relative;
}

.video-word {
    position: absolute;
    top: 25%;
    width: 80%;
    left: 10%;
    background-color: rgba(0,0,0,0.5);
    opacity: 1;
    z-index: 1;
}

.video-for-mask {
    background-color: #333;
}

.video-js {
    max-height: 700px;
}