A Facebook video downloader is a tool or software application designed to allow users to download videos from Facebook onto their devices. These downloaders usually work by extracting the video's URL and then downloading the video file to the user's computer, smartphone, or other devices. Facebook downloader enables users to watch the videos offline, share them with others, or save them for later viewing without an internet connection. However, using such tools responsibly and respecting copyright laws and Facebook's terms of service is essential.