Videos won't load

Hi,

I have a problem getting the videos to load.

I get them to display just fine, but none of the videos will load in when pressing play.

I’ve tested both uploading a video directly to WordPress and I’ve included a youtube link, none of them works.

Here is a live test page: http://screenpartner.norisp.no/~flex/test-page/

https://wordpress.org/plugins/html5-videogallery-plus-player/