.main_box{
    margin-top: 0 !important;
    max-width: none !important;
}

.main_box .multi_box {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    justify-content: space-between;
    width: 100%;
}

.main_box .multi_box .video_box {
    background: #333;
    margin-top: 0 !important;
}

.main_box .multi_box .video_box .video_player {
    width: 50%;
    height: calc(min(50vw, 1080px) / 16 * 9) !important;
}


@media (max-width: 768px) {
    .main_box .multi_box {
        min-width: calc(100vw - 1.6rem);
        display: grid;
        grid-template-columns: repeat(1, 1fr);
        justify-content: space-between;
        width: 100%;
    }

    .main_box .multi_box .video_box .video_player {
        width: 100%;
        height: calc(min(100vw, 1080px) / 16 * 9) !important;
    }

}