All you need to download any embedded youtube vid is to install the Chrome extension.  Copy and paste that and you are on easy street.  You know Facebook won’t give you any way of downloading embedded vids because Facebook likes all of their users to remain on their site. facebook download videos with extension

Facebook Video Downloader adds a link to the current video you’re watching and makes the download super-easy!

Facebook Video Downloader adds a link to the current video you're watching and makes the download super-easy!

https://chrome.google.com/webstore/detail/facebook-video-downloader/gkiknainhponefbagnfbfkibopojanof?hl=en-US If this doesn’t work, then you can use the full Wikihow tutorial step by step on how to download Facebook videos. http://www.wikihow.com/Download-Facebook-Videos-Free