Learn how to download Facebook videos without using any software or online tool.
How To Download a Video On Facebook:
1. Obtain the Facebook video URL
2. Open a new tab and paste the URL in the address bar.
3. Manipulate the URL into a basic mobile URL
4. Then load the mobile interface.
5. Right click and open video in a new tab.
6. Then Right click again and save video as.
Facebook video download tools are also usable if you don't mind them. This one from Fbideo works well on both the web and mobile interfaces: