Unlike with photos, Facebook does not offer a download button for your friends' videos. It is not difficult to download a copy of a video for your own computer, to watch whenever you like without an Internet connection. The videos on Facebook are Flash (FLV), so you will need an FLV-compatible media player.
Copy and paste the URL for the Facebook video into the blank field under "Paste video link/URL."
Click "Download Video." You may need to install the Java plug-in to view the link that allows you to download the video. If the Privacy setting of the Facebook video is not set to "Everyone," you will not be able to download the video.
Watch the full video in your Internet Explorer Web browser.
Click the "Tools" icon in the browser menu, then select "Internet Options." Under "Browsing history," select "Settings," then click the "View Files" button to open your "Temporary Internet Files" folder.
Find the large file inside the "Temporary Internet Files" folder that does not have an extension.
Move it to your desktop, or to another folder.
Rename the file and add FLV extension to it.
Watch the complete video in your Firefox Web browser.
Find your Profiles folder in "C:\Documents and Settings\USER\Local Settings\Application Data\Mozilla\Firefox."
Find the large file in the "Profiles" folder with no extension.
Move the file to your desktop, or to folder of your choice.
Rename the file. Include the FLV extension.
With the URL of the Facebook video in your browser, add the word "down" before "facebook.com," then press Enter. This is the second way you can use DownFacebook.com to download a Facebook video. For example, change "http://www.facebook.com/video/video.php?v=70409658791" to "http://www.downfacebook.com/video/video.php?v=70409658791." Some FLV-compatible media players for your desktop include Media Player Classic, RealPlayer, VLC media player and Winamp.