A video shared on X can travel quickly, but speed does not create permission. A public post may be visible to a large audience while still being owned by the person who filmed or edited it. Before saving a copy, decide whether you are archiving your own work, helping a client preserve an authorized clip, or simply taking someone else's video because it is easy to reach.
FAST-VID attempts supported public links and shows the media formats that yt-dlp can discover. It does not sign in to X, import cookies or unlock protected accounts, age-restricted posts or content that requires a logged-in viewer. That restriction is a feature of the workflow, not a challenge to bypass.
1. Permission, copyright and context
Use FAST-VID for videos you own or have permission to download. A public X post does not grant a license to republish, edit or monetize the video. If you want to use someone else's clip in a project, ask the person who controls the rights and keep the permission clear.
Context matters too. A video may include bystanders, private information, a news event or a creative performance. Copyright is only one of the interests involved. Respect the people in the video and do not use a downloaded clip to harass, dox or misrepresent them.
The Acceptable Use Policy and Copyright & Takedown page apply to X links. FAST-VID is independent and is not affiliated with X or Twitter.
2. Public posts versus protected accounts
A public X post can be opened without following the account or signing in, although X may still show a login prompt in some situations. FAST-VID works only with the public response the server receives. A post from a protected account, a post that requires age confirmation, or a post that X hides behind a login wall is not part of the supported workflow.
Do not send your X password, session cookie or two-factor code to a downloader. FAST-VID does not accept platform cookies and will not use them. If the only way to see the video is through your signed-in account, ask the poster whether they can provide the original file instead.
A public post can also contain multiple media items. FAST-VID processes the media exposed by the submitted post link; it does not promise a separate download for every image or video in a thread. If you need a specific clip, use the post that contains it rather than a thread or profile URL.
3. The FAST-VID workflow
Copy the post link
Open the post and use the share menu or copy the URL from the address bar. The link should point to a specific status/post, not a profile or a search page. X links may use either the x.com or twitter.com domain; both are attempts to identify the same post format, but support depends on the current extractor.
Paste and request media info
If you choose to test the link, open one of the three tool pages from the platform chooser, paste the public link into its URL field and choose Get media info. There is no X-specific field, and X support is not verified. The worker asks the source what public media is attached; a successful lookup may open a result card, but a rejection is expected for unsupported or restricted posts.
Choose a format
For a video archive, select an available MP4 quality. For audio-only use, check the audio tab. FAST-VID may offer MP3 and M4A when the source provides a compatible audio track. X videos may be short, but the output can still be larger than expected if the source provides a high bitrate.
Preview or download
Completed MP4 output can use the browser's native preview. MP3 and M4A are download-only. The file is temporary, so save it promptly after the result is ready. If it expires, request the same public link again.
4. Format and quality choices
MP4 is the practical choice for a complete X video. The source may provide one resolution or several variants. FAST-VID groups video choices where it can identify quality, but an X post may not expose the same metadata as a long-form video platform. A “Best quality” choice can appear when a clear resolution label is unavailable.
MP3 is useful for audio notes and personal listening. It is a conversion, not a bit-for-bit copy of the original audio. M4A is the “original, no conversion” audio option when a compatible track is available. Many short X clips may not expose a separate audio stream that can be packaged, so the audio tab can be empty.
The default maximum file size is 500 MB. Short social clips normally fit comfortably, but a long video, a high-resolution upload or a file with an unusual source format can exceed the limit. FAST-VID may show a size estimate when the source provides one; a final file can still differ after merge.
5. What FAST-VID does not do
FAST-VID does not log in to X, import cookies, bypass protected-account restrictions or guarantee that a post's video is downloadable. It does not stitch a thread into a single video, transcribe audio, add subtitles or edit the clip. It does not promise that a saved file will retain every piece of post context; the file is the media, not the conversation around it.
If you need a high-quality master for a licensed production, ask the person who posted the video for the original file. A platform download is a convenience copy and may be re-encoded by the source.
6. Troubleshooting X links
The post asks you to sign in
FAST-VID cannot use your X session. A login wall means the public workflow is unavailable for that link. Do not provide your password or cookies to the downloader.
The post is protected or deleted
Protected accounts and removed posts are outside the service. If the video is yours, use your own archive or export. If someone else owns it, ask them for a copy rather than trying to get around the restriction.
The link is a thread or profile
Use the specific post URL that contains the video. A profile or thread does not identify a single media item clearly, and FAST-VID processes one item at a time.
No formats appear
The post may not contain a supported video, may require a login, or may use a media format that the current extractor cannot read. Retry once with the canonical post URL; repeated failures should be treated as unsupported.
The audio tab is empty
The source may not expose a separate audio stream that can be extracted. A video download can still be available. Audio-only output is not guaranteed for every X post.
The file expired
Request the public link again and save the completed file promptly. FAST-VID does not keep a permanent media library.
7. Frequently asked questions
Does FAST-VID have a dedicated X button?
No. The current public interface has dedicated YouTube, TikTok and Instagram tools only. There is no generic URL field or verified X workflow. X links are not part of the supported interface, so do not rely on this guide as a supported download path.
Can I download a video from a protected X account?
No. FAST-VID does not authenticate with X, so protected-account posts and login-gated media are outside the supported workflow.
Can I save a video from a thread?
Use the specific post that contains the video. FAST-VID processes one media item and does not promise to assemble every clip in a thread.
Can I republish the video after saving it?
Only with permission and in accordance with X's terms and applicable law. Downloading a public post does not grant reuse rights.
8. Responsible use
Save only content you own or are authorized to download. Do not use a saved X video to impersonate someone, misrepresent an event or publish private information. If a rights holder asks you to remove a copy you are not permitted to keep, follow the Copyright & Takedown process.
FAST-VID is independent and is not affiliated with X or Twitter. It provides a technical attempt at a public link; it does not decide whether your intended use is lawful or appropriate.
Sources and references
- X Terms of Service — platform terms for X content and accounts.
- X copyright policy — X's copyright help page.
- yt-dlp supported sites — the extractor project used by the FAST-VID worker.
Try FAST-VID
FAST-VID does not currently offer a verified X tool. Open the platform chooser for the three supported tools; X links are not a documented supported workflow.