On the Facebook app, go to your desired video, tap on the share button, and then select Copy link.
2. Open your web browser and navigate to FBTake.com, paste the copied URL into the address field on the top of this page, and tap on the Download button
3. Wait for a while until the video is ready to download; then, you can download the video in the quality of your choice.
Go to this path to view the downloaded video Files: app ~> iCloud Drive ~> Downloads folder.