Mastodon Video Downloader
ViralMint is a Mastodon video downloader that pulls original-quality mp4s from any Fediverse instance, ready for local analysis and archiving.
Why download Mastodon videos with ViralMint?
Mastodon is the leading open-source decentralized social network in the Fediverse. Because it is decentralized across thousands of instances, video URLs can vary wildly in structure. ViralMint's downloader identifies the underlying media manifest regardless of the host instance, fetching the original-bitrate mp4. This is ideal for researchers tracking decentralized news or technical communities that have migrated away from centralized platforms.
How to download from Mastodon
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Copy the Mastodon video URL
From mastodon.social, copy the share or page URL — e.g.
https://mastodon.social/@username/1234567890 -
Paste it into ViralMint
Open the ViralMint desktop app and paste the URL into chat. The planner detects the Mastodon URL and triggers the download automatically — no flags, no command line.
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Get the mp4, transcript and AI insights
The video lands in the Videos page with a local Whisper transcript and AI-extracted hook / structure / tone — ready for clip extraction or repurposing.
Frequently Asked Questions
Does this work with any Mastodon instance?
Yes. ViralMint's engine is designed to handle the various URL structures used by different Mastodon instances and other Fediverse platforms like Pleroma or Misskey.
Can I download videos from 'Followers-only' posts?
To download restricted content, you must supply browser cookies from an account that has permission to view the post. Public posts require no authentication.
Does it support 4K video from instances that allow it?
ViralMint always fetches the highest quality variant available on the source instance. If the creator uploaded a 4K file and the instance preserves it, ViralMint will download it in full fidelity.
How ViralMint compares to other Mastodon downloaders
| Approach | Examples | Trade-off | ViralMint advantage |
|---|---|---|---|
| Online converters | Y2mate, SaveFrom, ssyoutube, OnlineVideoConverter | Pop-up ads, redirects, quality capped at 720p, file-size limits, no batch downloads, your URL logged to ad networks | Local app, zero ads, original quality (up to Original (up to 4K)), unlimited file size, batch mode |
| Browser extensions | Video DownloadHelper, FastestTube, similar Chrome / Firefox add-ons | Routinely broken after Mastodon updates, removed from stores for ToS violations, no transcript or AI analysis | Updates with yt-dlp upstream (community-maintained), independent of browser extension stores, Whisper transcript built in |
| yt-dlp command line | yt-dlp, youtube-dl | Most flexible option but requires terminal comfort, manual cookie handling, no GUI for batch selection | Same yt-dlp under the hood, wrapped in a desktop GUI with cookie auto-detect, batch UI, and post-processing pipeline |
| Closed-source desktop apps | 4K Video Downloader, Allavsoft, ByClick Downloader | Closed-source, paid tiers gate batch and HD, no AI pipeline, no extensible Whisper / FFmpeg post-processing | Open source (AGPL-3.0), AI features prepaid per-action, integrates with the rest of the ViralMint creator pipeline |
Supported URL Example
https://mastodon.social/@username/1234567890Equivalent yt-dlp command
If you already use yt-dlp, the desktop app's Mastodon download is equivalent to running:
yt-dlp -f "bv*+ba/b" --merge-output-format mp4 "https://mastodon.social/@username/1234567890"ViralMint also auto-runs Whisper transcription, downloads the thumbnail, and extracts AI hook / structure / tone insights — steps that take a separate command chain in raw yt-dlp.