The file you get is the whole argument
A friend sent me a video from a page neither of us follows. She wanted it saved. I tried three downloaders. Two gave me nothing, and the third handed back a 240p file that looked like it had been photocopied twice.
That is the short version of how I ended up testing these things properly in 2026. Nobody argues about the interface. It is always the file.
Four things I check now
One: does it work on posts you can see but do not own. Most of what people actually want to save is public, but it sits on a page or a group you have access to. Plenty of tools choke on that and only handle the cleanest case.
Two: is the audio still there, on both tracks. Facebook serves video and audio separately. Tools that grab only the video track give you a silent file, and they do not warn you. I test with a clip that has someone talking on one side and music on the other.
Three: what resolution comes back. The feed version and the HD source are different files. If the downloader hands you whatever it can reach first, you get the feed copy, and you will not notice until it is on a bigger screen.
Four: does it want your account. A public post should not require a login. If it does, the tool is collecting something it does not need.
What I use for this
For the general case, VidTray clears all four. It reads public posts and page videos without an account, keeps both audio tracks, and returns the highest version the post actually has rather than the feed copy. That last one is the difference between a file you keep and a file you delete.
The one case it does not solve is a private group. Nothing public can reach inside a group you are not in, and I would be suspicious of a tool that claims otherwise. That is a boundary, not a bug.
How it goes in practice
Open the post or the video and copy its link.
Paste the link into the field and let it read the post.
Pick the largest version listed and save the file.
Three moves. The first one is the only place people go wrong, and it is because they try to copy from the video player instead of the post itself.
Two questions that come up
Can it save a video from a live stream? Not the live stream itself. Once the recording is posted, that works like any other video.
Does it work on phone? Yes. Same link, same three steps, and the file goes to your downloads.
The honest summary
Four checks: access to public posts, both audio tracks, the real resolution, no login wall. Most tools that rank well fail at least one of them, and it is almost always the resolution, which is the one failure you will not catch until later.
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