弹出窗口打开时禁用背景视频

Question

我有带音乐的视频背景，我希望它在视频弹出窗口打开时静音或禁用，因为它还有音乐。

HTML背景：

<section class="waypoint video-block fullscreen" data-hash="welcome" style="padding:0;">
    <video autoplay="autoplay" loop="loop" poster="img/VideoHDimg.png" class="background-video">
        <source type="video/mp4" src="video/VideoHD.mp4">
        <source type="video/ogm" src="video/family_1.ogm">
    </video>

HTML Popop：

<div id="video-popup" class="mfp-hide self-video-popup"><div class="some-element">
    <video muted="muted" loop="loop" controls poster="img/popupvideo.jpg">
        <source type="video/mp4" src="video/popupvideo.mp4">
        <source type="video/ogm" src="video/family_1.ogm">
    </video>

CSS：

.alt-bg {
    box-sizing: content-box;
    -moz-box-sizing: content-box;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1) inset;
    margin-bottom: 40px;
    margin-right: 0;
    margin-top: 40px;
    border-color: #E4E4E4;
    padding: 30px 0;
}

.video-block {
    background-position: center center;
    background-repeat: repeat;
    overflow: hidden;
    position: relative;
    width: 100%;
    float:none;
    text-align:center;
    margin:0;
}

.mfp-inline-holder .mfp-content {
    line-height: 0;
    max-width: 900px;
    width: 100%;
}

.self-video-popup {
    height: 0;
    overflow: hidden;
    padding-top: 56.25%;
    width: 100%;
}

.self-video-popup .some-element {
    background: none repeat scroll 0 0 black;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.6);
    display: block;
    height: 100%;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
}

.self-video-popup .some-element video {
    width:100%; 
    height:100%;
}

.text-inner {
    position:relative; 
    z-index:4;
}
.background-video {
    width:100%;
    height:760px;
    position:absolute;
    top:0;
    left:0;
}

JS

var MPopup = {
    init: function () {
        MPopup.video('a.play.video');
        MPopup.self_hosted_video('a.play.video.self-hosted');
        MPopup.image('.portfolioContainer');
    },
    video: function (idName) {
        jQuery(idName).magnificPopup({
            mainClass: 'mfp-fade',
            items: {
                src: jQuery(idName).attr('href')
            },
            iframe: {
                markup: '<div class="mfp-iframe-scaler">' +
                        '<iframe class="mfp-iframe" frameborder="0"           allowfullscreen></iframe>' +
                        '<div class="mfp-close"></div>' +
                        '</div>', // HTML markup of popup, `mfp-close` will be replaced by the close button
            },
            type: 'iframe'
        });
    },
    self_hosted_video: function (idName) {
        jQuery(idName).magnificPopup({
            mainClass: 'mfp-fade',
            type: 'inline'
        });
    },
    image: function (idName) {
        jQuery(idName).magnificPopup({
            mainClass: 'mfp-fade',
            delegate: 'article:not(".ajaxed") a:visible',
            gallery: {
                enabled: true,
                navigateByImgClick: true,
                preload: [0, 1] // Will preload 0 - before current, and 1 after the current image
            },
            callbacks: {
                buildControls: function () {
                    if (jQuery.magnificPopup.instance.items.length > 1)
                        this.contentContainer.append(this.arrowLeft.add(this.arrowRight));
                },
                open: function () {
                    jQuery('.mfp-description').append(this.currItem.el.data('title'));
                },
                change: function () {
                    var mfp = jQuery.magnificPopup.instance;
                    var container = jQuery(mfp.container);

                    if (mfp.index >= mfp.items.length - 1)
                        container.addClass('mfp-last');
                    else
                        container.removeClass('mfp-last');
                    if (mfp.index == 0)
                        container.addClass('mfp-first');
                    else
                        container.removeClass('mfp-first');
                },
                afterChange: function () {
                    jQuery('.mfp-description').empty().append(this.currItem.el.data('title'));
                }
            },
            image: {
                verticalFit: true,
                markup: '<div class="mfp-figure   mfp-with-anim">' +
                        '<div class="mfp-img"></div>' +
                        '<div class="mfp-bottom-bar">' +
                        '<div class="mfp-description"></div>' +
                        '<div class="mfp-close"></div>' +
                        '</div>' +
                        '</div>'
            },
            type: 'image',
            closeOnContentClick: false,
            midClick: true,
        });

    }
}

我希望背景视频静音或在视频弹出窗口打开时停止播放，并在视频弹出窗口关闭时恢复正常。