A note here, Chris
When I first went to this thread, I saw no video at all, just a blank space where I expected it would be located.
Then it occurred to me that I had accessed the forum with a URL that began with 'https' (note the 's'). Apparently FireFox operating in this secure mode does not allow material originating from what it considers insecure sites (sites without 's' ? don't know).
So I removed the 's' from the URL and, voila, your video appears.
The moderators should be made aware of this so, when users complain about not seeing linked material, they can advise them to operate unsecured.
Perhaps there are other ways to deal with this problem but I only know of this technique.