Do you want to download Facebook videos quickly and free of charge? Want to transfer the video to your phone to watch later?

Here is A Secret Trick to Help You Save Facebook Videos on Android.

Open m.downloadatoz.com, download an app named 'Facebook Video Dwnloader'.
This app has been removed from Google Play. So you can't get it from play store any longer.
Facebook Video Downloader apk download link

After installing this app, everything is easy:

Click a video on Facebook
Choose [Facebook Downloader]
Done!

It's a very simple trick. Hope you enjoy it.