Resize Header Video for Mobile?

Site URL: http://www.westofnashvillehomes.com

Need some help here. Trying to resize this sites Header Video on Mobile but not having much luck

Change your current code to this

@media screen and (max-width: 767px) {
    .homepage #page section:first-child iframe {
        width:100% !important;
        left: 0 !important;
        height: auto !important;
    }
    .homepage #page section:first-child {
        min-height: unset !important;
        height: 30vh !important;
        margin-top: 10vh;
    }
}