https://l24.lt/templates/l24/javascript/hplayer.js?v=4

1jQuery(document).ready(function($){
2$.fn.isInViewport = function() {
3    var elementTop = $(this).offset().top;
4    var elementBottom = elementTop + $(this).outerHeight();
5
6    var viewportTop = $(window).scrollTop();
7    var viewportBottom = viewportTop + $(window).height();
8
9    return elementBottom > viewportTop && elementTop < viewportBottom;
10};
11
12$(window).on('resize scroll', function() {
13    if ($('.customvd').length > 0 && $('.customvd').isInViewport()) {
14	if($('.customvd').children().length == 0) {
15		$('#ytplayer').appendTo('.customvd').hide()
16    .fadeIn(1000);
17	}
18    } else {
19        if($('#hoover-player').children().length == 0) {
20                $('#ytplayer').appendTo('#hoover-player').hide()
21    .fadeIn(1000);
22        }
23    }
24});
25});