Step 1:
Go to the site that is mentioned below.
Step 2:
Put the facebook video link in the box beside the nab video button.
Example: http://www.facebook.com/video/video.php?v=519407131970
Step 3:
Click Nab Video. A download link will be generated.
Step 4:
Put the download link in Free Download manger and downlaod the file in .flv extension.
DISADVANTAGE:
IF THE VIDEO IS RATED AS PREMIUM ,YOU CANNOT RESUME THE DOWNLOAD IF THE DOWNLOAD IS BROKEN OR YOU ARE NOT ALLOW TO DOWNLOAD PREMIUM VIDEO.
DOWNLOAD LINK FOR FDM:
http://www.easy-share.com/1903718889/fdminst-lite.exe
SITE NAME TO CONVERT YOUR VIDEO LINK FOR DOWNLOAD :
http://www.clipnabber.com