https://trentofestival.it/wp-content/themes/trento-film-festival/s…?ver=cb49cff4-c604-4c4f-8c0c-ebb7f2e784b5

1(function($) {
2    function update() {
3        $('.html5-banner[data-width][data-height]').each(function() {
4            var w = parseInt($(this).data('width')), scale = ($(this).width() / w);
5
6            $(this).find('iframe').css('transform', 'scale(' + scale + ')');
7            $(this).find('iframe').css('-webkit-transform', 'scale(' + scale + ')');
8        });
9    }
10
11    $(function() {
12        $('.html5-banner[data-width][data-height]').each(function() {
13            var w = parseInt($(this).data('width')),
14                h = parseInt($(this).data('height'));
15            
16            $(this).css('padding-bottom', ((h / w) * 100) + '%');
17            $(this).find('iframe').width(w);
18            $(this).find('iframe').height(h);
19        });
20
21        update();
22        
23        $(window).on('resize', update);
24    });
25})(jQuery);