https://www.alaskaaircargo.com/wp-content/plugins/cherry-parallax/js/cherry.apiloader.js?ver=1.0

1var _window = $(window),
2    youtube_api_load = false,
3    youtube_api_loaded = false,
4    vimeo_api_load = false,
5    vimeo_api_loaded = false;
6
7function check_youtube_api(callback)
8{
9    if(!youtube_api_load && !youtube_api_loaded)
10    {
11        youtube_api_load = true;
12        $.getScript( 'https://www.youtube.com/iframe_api', function( ) {
13            _window.on('youtubeApiReadyEvent', function(){
14                callback();
15            })
16        })
17    } else if (youtube_api_load && !youtube_api_loaded)
18    {
19        _window.on('youtubeApiReadyEvent', function(){
20            callback();
21        })
22    } else if (youtube_api_load && youtube_api_loaded)
23    {
24        callback();
25    } 
26}
27
28function onYouTubeIframeAPIReady() {
29    youtube_api_loaded = true;
30    _window.trigger('youtubeApiReadyEvent');
31}
32
33function check_vimeo_api(callback)
34{
35    if(!vimeo_api_load && !vimeo_api_loaded)
36    {
37        vimeo_api_load = true;
38        $.getScript( '//f.vimeocdn.com/js/froogaloop2.min.js', function( ) {
39            vimeo_api_loaded = true;
40            _window.trigger('vimeoApiReadyEvent');
41            callback();
42        })
43    } else if(vimeo_api_load && !vimeo_api_loaded)
44    {
45        _window.on('vimeoApiReadyEvent', function(){
46             callback();
47        })
48    }  else if(vimeo_api_load && vimeo_api_loaded)
49    {
50        callback();
51    }
52}