Seven deadly sin
GenFK is a free online tool to download your FB videos. It let you download your videos from FB without requiring any app or software installation, you can use the simple browser to visit the site and get your videos downloaded.
You can also search for any video and watch them, before downloading. Multiple videos can be downloaded simultaneously without any lag. It's free and simple, very easy to use, without any need for proxy, and without any software install required. Just type or paste the video URL in the input box and hit the "Download" button. Its fast script will extract the MP4 which you can be download.
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. The download link is valid for 3 hours after which it will expire and do not work. All downloads are served via SSL (HTTPS) to ensure the safety of the data.