The method is much simple and easy than what you are expecting.
And after that you’ve got the option to download these from facebook anytime from your android.
So just follow the below method to proceed.

So follow some simple steps below to proceed.
First of all download and install latest version ofMyVideoDownloader for Facebookapp in your android equipment.
Now launch the app and then thereLoginwith your Facebook account as this gonna get all your Facebook videos.

And from the drop down list select theDownloadbutton.
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