$( window ).resize(function() {
    reload_video_size()
});
$(function(){
   reload_video_size()
});
function reload_video_size(){
    var fr = $('iframe');
    var w = parseInt(fr.attr('width'), 10);
    var h = parseInt(fr.attr('height'), 10);
    var w_par = fr.parent().width();
    var w_per = w/100;
    var h_per = h/100;
    var diff = (w_par/w_per) - 100;
    fr.attr('width', w + diff*w_per);
    fr.attr('height', h + diff*h_per);
}