var $container = $('#masonry');
    $container.imagesLoaded( function() {
        $container.masonry({
            itemSelector: '.list-all-video__item'
        });
        $container.addClass('loaded');
    });

#masonry {
    opacity: 0;
    transition: opacity 0.4s ease-out 0s;
}
#masonry.loaded {
    opacity: 1;
}