.box-1 {
    display: flex;
}

.video-1 {
    width: 30vw;
    padding: 15px 15px;
    margin-left: auto;
    margin-right: auto;
    display: block
}

.video-2 {
    width: 30vw;
    padding: 15px 15px;
    margin-left: auto;
    margin-right: auto;
    display: block
}

.iframe-1 {
    padding: 15px 15px;
    margin-left: auto;
    margin-right: auto;
    display: block
}