Videos are the big part of Facebook’s growth as social media network has reached over 2 billion monthly active users.
Many people use Facebook surely for watching videos using their PC, smartphones or tablets. They can watch videos online, however, the biggest social network site doesn't yet have an offline-view feature. It also does not let users download videos directly.
The only option Facebook gives is ‘Save Video’ to watch it later.
However, there are several other websites and mobile Applications available that help you in downloading the Facebook videos.
How to download Facebook videos for PC