$( '#media-gallery' ).on( 'beforeChange', function() {

        var currentDisplayedSlide = $( '.slick-current' );

        if ( currentDisplayedSlide.find('video').length ) {
            currentDisplayedSlide.find('video').get(0).pause();
        }
    });

    $( '#media-gallery' ).on( 'afterChange', function() {

        var currentDisplayedSlide = $( '.slick-current' );

        if ( currentDisplayedSlide.find('video').length ) {
            currentDisplayedSlide.find('video').trigger('pause').get(0).load();
            currentDisplayedSlide.find('video').get(0).play();
        }
    });