body {
    display: flex;
    text-align: center;
}

#app {
    margin: 0 auto;
}

.video-list {
    column-count: 1;
    width: 100%;
}

@media screen and (min-width: 1000px) {
    .video-list {
            column-count: 8;
        }
}
@media screen and (min-width: 800px) {
    .video-list {
        column-count: 4;
    }
}