If I'm logged, videos won´t load

Edit. Now it’s not working. No matter what.

I´ve been experiencing problems with the page… whenever I log in to keep track of my progress (in which I haven’t been able to do anything…), videos won´t load, the page will stay trying to load the YouTube video, but will never appear.

If I go directly to the lesson without logging in, it´ll instantly load it, and I can work but can’t keep track of my progress…

Chorme?

I started having this problem when I open the page with Chrome, and it all started after I run a Win7 update.

No problems if I open the page with Mozilla