It's one of the most common questions about video downloaders, and the honest answer is straightforward: no, you cannot download a private Facebook video, and any tool that claims otherwise should raise a red flag.

Why This Is a Hard Boundary, Not a Feature Gap

Downloader tools like FacebookReelDown work by fetching the video file from the public URL Facebook already serves to anyone viewing that content. If a video is set to private, restricted to friends, or posted in a closed group you're not a member of, there is no public URL for any external tool to reach — the video simply isn't being served outside of an authenticated, permission-checked session.

Getting around that would require either logging into someone's account or exploiting a security flaw in Facebook itself. Neither is something a legitimate downloader does, and neither is something you'd want a tool asking you for in the first place.

Watch Out for Tools That Ask for Your Facebook Password

If a "downloader" asks you to log in with your Facebook credentials before it'll fetch a video, that's a meaningful warning sign. Downloading a public video never requires your account — only your own login has any bearing on private content, and handing your password to a third-party site to "unlock" that isn't how privacy permissions work. At best it does nothing useful; at worst it's a credential-phishing attempt.

What You Can Download

If You Need to Save Something From a Closed Group

If you're a member of a private group and want to keep a copy of a video shared there, the respectful approach is to ask the original poster directly, or use Facebook's own in-app options where available. External downloaders are built around public URLs, and treating that boundary as fixed — rather than something to work around — is the difference between a normal utility and a privacy risk.

Bottom Line

If it's public, FacebookReelDown can fetch it. If it's private, no tool legitimately can — and that's exactly how it should work.

The same privacy boundary shows up in a few specific contexts — see why a Facebook video download might fail for the full list of causes, or Facebook Group video downloading for how Group privacy specifically works.