Save a Public Niconico Video as MP4

Niconico still hosts niche video behind a login wall on some uploads, so only truly public watch pages are fair game for a paste-link save.

Some Niconico pages hide the file

Niconico mixes public archives with content that requires a free account or a premium subscription. The player may appear after you sign in even though the underlying file is not world-readable.

Start with a watch page that plays while you are logged out in another browser profile. That is the same visibility a downloader gets.

Copy the nicovideo.jp watch URL

Open the video on the main site and copy the address bar with the sm or so id. Search results and mylist pages do not carry enough information.

Short links from SNS posts should expand to the watch page before you paste them.

Run the Niconico downloader

Paste the public URL into FileShot, run Analyze, and download the MP4 when qualities appear. Comment overlays in the player are separate from the video file you receive.

Long broadcasts may need extra prep time. Leave the tab open until the worker finishes segment joins.

Uploads that stay locked

Deleted videos, membership-only posts, and uploads blocked in your region return errors. Niconico may also refuse export on certain premium animations.

If login is required to even see the thumbnail, do not paste that link into a public tool.

If the page plays but Analyze fails

Open the same URL in a private window before you paste it into niconico downloader. A public Niconico link should list formats within about a minute when the CDN responds. Logged-in cookies often show a player that anonymous servers cannot fetch, which looks like a broken tool even when the real issue is visibility.

After the file lands on disk

Play the full length once with sound on. If the runtime matches what you saw in the browser, keep that copy before you close the tab. You can paste another public link anytime on the general downloader, but a finished transfer already proved this host path worked for you today.

Open FileShot for Niconico when you have the link ready, or paste any other public URL on the main video downloader. For background on the pipeline, read video downloader not working. The following post covers Download a Public VK Video From the Link.