I'm having trouble getting the page to load so I can look at my browsers dev tools for potential problems. And I have a relatively fast cable connection.
I'm thinking there's a good chance the problems are related to the weight of the page. (around 23 MB)
PageSpeed Insights (can't determine speed)
However, even if the script can be fixed, IMHO, you should consider reducing the weight of the page. Perhaps simple images that link to pages with only a single media file? If the page loads slow for me and Google, there's a good chance you're losing a lot of potential visitors. If it loads relatively fast for you it's probably because you're pulling the files from cache, but new visitors haven't cached them.