$(document).ready(function () {
  
  $('.main_banner').on('init', function(ev, el){
    $('video').each(function () {
        this.play();
    });
  });

  //banner główny
  $('.main_banner').slick({
    dots: true,
    infinite: true,
    speed: 1000,
    slidesToShow: 1,
    autoplay: false,
    autoplaySpeed: 3000  });
  
});