DownFK is a free online tool to download your Facebook videos. It let you download your videos from Facebook without requiring any software installation, you can use simple browser to visit the site and get your videos downloaded.
It can help you to download private videos shared with you by your friend and let you save it in any device like mobile, PC, laptop, MAC to play anytime, anywhere.
Videos are downloaded in MP4 format and available in 2 resolutions i.e. HD (high-definition) and SD (standard-definition). HD video is not available for all videos. Download link is valid for 3 hour after which it will expire and not works. All downloads are served via SSL (https) to ensure the safety of the data.