html {
    font-family: Verdana;
}
a {
    text-decoration-line: none;
}
.flex-container {
    display: flex;
    flex-wrap: wrap;
}

.flex-container > div {
    margin: 10px;
    text-align: center;
    width: 640px;
    height: 480px;
    background: lightgray;
}
span {
    display:block;
    font-size: 30px;
    font-weight: bold;
    color:black;
}
a > div {
    padding: 50px 0px;
}
.option {
    display: inline-block;
}
.option > img {
    height: 150px;
    cursor: pointer;
}
video {
    max-width: 100%;
    max-height:100%;
}
.thumb {
    cursor: pointer;
}