Hello,
My name is Luciano, I am an experienced web developer, and I would like to help you with this video issue, it seems that you store the video URL and uses it later, but that is not correct because CDN facebooks video's urls get updated after a period of time.
If you open the debugger (F12), you will see an error 403 when trying to load the video resource:
'URL signature expired'
I can have it complete by tonight or tomorrow first thing.
In order to work properly and do pertinent test in a secure enviroment I would need to replicate the site in my localhost if it is not to big, or if you have an db structure and the site source would be enough too.
Thank you,
Luciano