I tried it and it worked...first try. I'm hoping it works when I try to post our next weekly video.
Try the following steps. I hope they work for you, too!
1) On the YouTube video page, click "Share" - be sure to select "Long Link".
2) Copy the link and paste it into your Notepad program.
3) Add "&sns=fb" to the end of the link.
4) Copy your new link and paste it into your Facebook status.
5) Cross your fingers.
Go here and enter the URL https://developers.facebook.
It will force it to refresh the cache for the given URL.