My Wii U is not play Html5 vids

I use a site called KissAnime and they have a HTML5 option for mobile devices. When ever I try to play a video in html5 is says "ERROR CODE: 112-2003.  Could not load video. Try reloading the page?" And I try to reload but it still doesn't play. Ive used it for more then a year and it worked fine until now. I've tried changing Wi-Fi networks but it didn't work. btw Youtube works fine.