Third-Party Licenses
Last updated: August 3, 2026. Our applications are built on the work of many open-source projects. This page lists every third-party component we ship, the license it is distributed under, and where to obtain its source code.
Why this page exists
Open-source licenses are not free of obligations. Most of them require that we tell you which components we include, reproduce their license text, and — for some — make their source code available to you. This page is how we meet those obligations, in one place, for all three products.
The components below are distributed unmodified. Where a component is licensed under the GPL, we ship it as a separate executable that our application starts as a child process; our own source code is not derived from it and remains proprietary. Your rights to those components come from their own licenses, not from ours.
Nothing in our End User License Agreement limits the rights granted to you by any license listed on this page. Where the two disagree, the component’s own license governs that component.
ClickandDown
The Windows and macOS desktop app. Media analysis and downloading are performed by yt-dlp; decoding, merging and format conversion by FFmpeg. Both run as separate command-line programs that our app starts and exchanges arguments with — they are not linked into our own code.
| Component | Version | License | Source |
|---|---|---|---|
| Electron | 28.x | MIT | github.com/electron/electron |
| Chromium | via Electron | BSD-3-Clause | www.chromium.org |
| Node.js | via Electron | MIT | nodejs.org |
| yt-dlp | 2026.03.17 | Unlicense (public domain) | github.com/yt-dlp/yt-dlp |
| FFmpeg / ffprobe | N-123767-g3a1e63e007 | GPL v3 | ffmpeg.org |
| x264 | in FFmpeg | GPL v2 or later | www.videolan.org/developers/x264.html |
| x265 | in FFmpeg | GPL v2 or later | www.videolan.org/developers/x265.html |
| LAME (libmp3lame) | in FFmpeg | LGPL 2.1 | lame.sourceforge.io |
| Opus | in FFmpeg | BSD-3-Clause | opus-codec.org |
| libvpx (VP8 / VP9) | in FFmpeg | BSD-3-Clause | www.webmproject.org |
| libaom (AV1) | in FFmpeg | BSD-2-Clause + patent grant | aomedia.googlesource.com/aom |
| libass, FreeType, HarfBuzz, FriBidi | in FFmpeg | MIT / FTL / OFL | ffmpeg.org |
| electron-updater | 6.x | MIT | github.com/electron-userland/electron-builder |
| winston & winston-daily-rotate-file | 3.x / 4.x | MIT | github.com/winstonjs/winston |
| node-fetch | 3.x | MIT | github.com/node-fetch/node-fetch |
| dotenv | 16.x | BSD-2-Clause | github.com/motdotla/dotenv |
ClickandStream
The Editor and Guest applications and the Adobe Premiere Pro panel. Review sessions run peer-to-peer: Trystero handles peer discovery, and the NDI runtime receives video from Premiere Pro.
| Component | Version | License | Source |
|---|---|---|---|
| Electron | 32.x | MIT | github.com/electron/electron |
| Trystero & @trystero-p2p/mqtt | 0.25.x | MIT | github.com/dmotz/trystero |
| Golden Layout | 2.6.x | MIT | github.com/golden-layout/golden-layout |
| koffi | 3.1.x | MIT | github.com/Koromix/koffi |
| pngjs | 7.0.x | MIT | github.com/pngjs/pngjs |
| ws | 8.18.x | MIT | github.com/websockets/ws |
| NDI® SDK runtime | — | Proprietary — Vizrt NDI AB | ndi.video |
| Adobe UXP platform | — | Adobe developer terms | developer.adobe.com/premiere-pro/uxp/ |
ClickandSend
The Windows and macOS transfer app and its Premiere Pro panel. File contents travel directly between the two computers; cloudflared is involved only when you explicitly switch on the remote-connection mode.
| Component | Version | License | Source |
|---|---|---|---|
| Python | 3.x | PSF License | www.python.org |
| pywebview | — | BSD-3-Clause | github.com/r0x0r/pywebview |
| Microsoft Edge WebView2 Runtime | — | Proprietary — Microsoft | developer.microsoft.com/microsoft-edge/webview2/ |
| PyInstaller | — | GPL 2.0 with bootloader exception | pyinstaller.org |
| cloudflared | — | Apache License 2.0 | github.com/cloudflare/cloudflared |
| Tcl/Tk (tkinter) | — | Tcl/Tk (BSD-style) | www.tcl.tk |
| Adobe UXP platform | — | Adobe developer terms | developer.adobe.com/premiere-pro/uxp/ |
| qrcode | 8.2 | BSD-3-Clause | github.com/lincolnloop/python-qrcode |
| tkinterdnd2 | 0.6.2 | MIT | github.com/pmgagne/tkinterdnd2 |
| gevent | 25.9.1 | MIT | github.com/gevent/gevent |
| greenlet | 3.3.2 | MIT / PSF | github.com/python-greenlet/greenlet |
| zope.event / zope.interface | 6.1 / 8.2 | ZPL 2.1 | github.com/zopefoundation/zope.interface |
| cffi / pycparser | 2.0.0 / 3.0 | MIT / BSD-3-Clause | github.com/python-cffi/cffi |
| MarkupSafe | 3.0.3 | BSD-3-Clause | github.com/pallets/markupsafe |
| clr-loader | 0.3.1 | MIT | github.com/pythonnet/clr-loader |
| altgraph | 0.17.4 | MIT | github.com/ronaldoussoren/altgraph |
Fonts, icons and shared interface libraries
Used across the apps and this website. The desktop apps carry local copies of these so the interface still renders correctly with no internet connection.
| Component | Version | License | Source |
|---|---|---|---|
| Tailwind CSS | — | MIT | github.com/tailwindlabs/tailwindcss |
| Inter typeface | — | SIL Open Font License 1.1 | github.com/rsms/inter |
| Material Symbols | — | Apache License 2.0 | github.com/google/material-design-icons |
| Font Awesome Free (brand icons) | 6.x | Icons CC BY 4.0 · CSS MIT | fontawesome.com/license/free |
Website and services
Components running on clickanddown.com, and the third parties that process data on our behalf.
| Component | Version | License | Source |
|---|---|---|---|
| PHPMailer | — | LGPL 2.1 | github.com/PHPMailer/PHPMailer |
| Google Analytics 4 | — | Google terms of service | policies.google.com/technologies/partner-sites |
| Cloudflare Tunnel | — | Cloudflare terms of service | www.cloudflare.com/website-terms/ |
Written offer for source code
ClickandDown includes a build of FFmpeg configured with
--enable-gpl --enable-version3,
which makes that build subject to the GNU General Public License, version 3.
The same applies to the x264 and x265 encoders contained in it.
In accordance with section 6 of the GPL v3, we will supply the complete corresponding source code for the exact FFmpeg build we distribute, on physical media or by download, for a period of at least three years from the date you obtained the software. We charge no more than the cost of performing the distribution. Write to info@clickanddown.com with the subject “FFmpeg source request” and state the version shown in the table above.
The corresponding upstream sources are also published by the FFmpeg project at
ffmpeg.org/download.html
and in its public Git repository. The build we ship is produced from public FFmpeg sources at commit
3a1e63e007.
The full text of the GNU General Public License v3 is available at gnu.org/licenses/gpl-3.0.html. We will also send you a copy on request, together with the license texts of the other components listed above.
Trademarks and attribution
NDI® is a registered trademark of Vizrt NDI AB. ClickandStream uses the NDI runtime under licence from Vizrt NDI AB and is neither produced nor endorsed by them.
Adobe and Adobe Premiere are either registered trademarks or trademarks of Adobe in the United States and/or other countries. Our Premiere Pro panels are independent products; we are not affiliated with, endorsed by, or sponsored by Adobe.
Microsoft, Windows and Edge WebView2 are trademarks of Microsoft Corporation. Apple, macOS and Apple Silicon are trademarks of Apple Inc. Cloudflare is a trademark of Cloudflare, Inc.
The names of video platforms and services that our software can interact with are the trademarks of their respective owners. Their use here is descriptive only and does not imply any affiliation, endorsement or partnership.
The Inter typeface is used under the SIL Open Font License 1.1. Font Awesome Free brand icons are used under CC BY 4.0.
Questions about licensing?
If you believe a component is missing from this page, that a license is stated incorrectly, or you want the source code of a component we distribute, tell us and we will correct it or send it. We would rather hear about it than get it wrong.
mail info@clickanddown.com