.video {
    background-color: #000;
}

footer {
    background-color: #000;
    margin-left: auto;
    margin-right: auto;
    display: block;
}

footer .one {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

body {
    color: white;
}

.video {
    width: 90%;
    margin-left: auto;
    margin-right: auto;
}

.video iframe {
    width: 360px;
    height: 210px;
    margin: 10px;
    border-radius: 6px;
    border: 6px solid white;
}

@media(max-width:620px) {
    .video {
        display: flex;
        align-items: center;
        justify-content: center;
        flex-wrap: wrap;
    }
    .video iframe {
        width: 100%;
        height: 210px;
        margin: 10px;
        border-radius: 6px;
        border: 6px solid white;
        margin-left: auto;
        margin-right: auto;
    }
}