I’m still wading through the possibilities. Now Chrome is giving me a bunch of 403 errors for the CDN subdomain.
I see the CDN subdomain is using Cloudflare. If you want to take advantage of that CDN, it should bypass Cloudflare. Set it to 
in the Cloudflare DNS page. Or don’t use that CDN since Cloudflare will cache those resources for you.
The video may work when bypassing Cloudflare because necessary resources on the CDN aren’t loading.