One-click download button injected directly into the YouTube player toolbar — opens cobalt.meowing.de with the video URL pre-filled. No copy-pasting, no hassle.
1. Click the ↓ button in the YouTube player toolbar 2. cobalt.meowing.de opens in a new tab with the URL ready 3. Pick your settings → hit download
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| Processing in progress | Download complete — 196 MB |
1. Install a userscript manager
| Extension | Browser |
|---|---|
| ScriptCat ⭐ recommended | Chrome, Firefox, Edge, Safari |
| Tampermonkey | Chrome, Firefox, Edge, Safari |
2. Install the script
Download cobalt-quick-download.user.js and drag & drop it into your userscript manager dashboard — or click the file directly if your manager supports auto-install.
3. Done
Navigate to any YouTube video. The download button appears in the player toolbar automatically.
Configure cobalt.meowing.de once and every download will follow your preferences.
| Setting | Recommended | Notes |
|---|---|---|
| Quality | 4k |
Falls back to next best if unavailable |
| Codec | av1 + opus |
Best quality & efficiency, supports 8K + HDR |
| Container | auto |
mp4 for h264 · webm for av1/vp9 |
| Setting | Recommended | Notes |
|---|---|---|
| Format | best |
Keeps original format, no re-encoding |
| Bitrate | 128kb/s |
Going higher won't improve quality |
| YouTube quality | enabled | Picks highest available audio track |
| Setting | Recommended | Notes |
|---|---|---|
| Filename style | basic |
Title - Author (quality, codec).ext |
| Saving method | download |
Saves directly without prompting |
| Subtitles | your language | Added automatically if available |
#hash, which cobalt reads nativelyyoutube.com/watch* and youtu.be/*