When I look in the console on the page you linked to, I am getting a 200 status from Marketo, and I can't spot any errors in the code.
Was the code below provided by Wistia?
<script>
wistiaEmbeds.onFind(function(video){
video.bind("play", function(){
var a= Munchkin.munchkinFunction('visitWebPage', {
url: '',
params: 'video=play'
});
_paq.push(['trackPageView', 'Video-play']);
return this.unbind;
}).bind("end", function(){
var a= Munchkin.munchkinFunction('visitWebPage', {
url: '',
params: 'video=end'
});
_paq.push(['trackPageView', 'Video-end']);
return this.unbind;
});
});
</script>