F2vid.com allows you to download private videos on Facebook with high quality: SD, HD, Full HD, 2K, 4K. You can download videos in closed, private Facebook groups quickly without installing any additional software.
To download a private video from Facebook, you follow these steps:
1. Access Facebook on your computer, find the video you want to download in private groups, then click on the posting time of this post
2. Press Ctrl+U (Windows) or ⌘-Option-U (Mac) to view the page source
OR
Right-click on any part of the page, then click the “View Page Source” option
3. Highlight all source code by pressing Ctrl + A (Windows) or ⌘ + A (Mac), then right-click and select “Copy“