#video-container, #thumbnails {
    margin-top: 15px;
}

.buttons-container {
    padding: 15px 0;
}

#thumbnails {
    display: flex;
    flex-wrap: wrap;
}

#thumbnails .img-container {
    padding-right: 4px;
}

.img-container .img-seconds {
    position: absolute;
    width: 70px;
    color: #fff;
    background: #1964a6;
    margin-left: 10px;
    margin-top: 10px;
    border: solid 1px #013e6a;
    border-radius: 5px;
    padding: 5px;
    display: none;
    cursor: pointer;
}

.img-container:hover .img-seconds {
    display: block;
}