THIRD-PARTY NOTICES
VidSail Media Downloader & Converter

Last Updated: August 2026

VidSail is developed and published by SALNEX.

This file provides notices for third-party software that may be included
with, bundled with, called by, or used to build VidSail Media Downloader
& Converter.

SALNEX does not claim ownership of third-party software. Each third-party
component remains the property of its respective authors, contributors,
maintainers, and rights holders and is provided under its own licence terms.

This notice is a summary and does not replace the complete licence terms
applicable to each component.

=======================================================================
1. FFMPEG AND FFPROBE
=======================================================================

Components:
- FFmpeg
- FFprobe

Purpose:
Media processing, media analysis, probing, conversion, merging, extraction,
encoding, decoding, and format handling.

Bundled Windows build:
Gyan.dev full build
Version: 2026-07-09-git-8de8405796

Bundled Linux build:
BtbN FFmpeg Builds
Package: ffmpeg-master-latest-linux64-gpl.tar.xz
Version: N-125907-ga7e72069f1-20260802
Architecture: Linux x86_64

Licence notice:
The bundled Gyan.dev full Windows build is a static GPLv3 build.

The bundled BtbN Linux build is from the GPL static Linux x86_64 build
family distributed by BtbN FFmpeg Builds.

FFmpeg source code contains software under several licences. The licensing
of a particular FFmpeg binary depends on the configuration options and
libraries used to build it.

The Gyan.dev full build distributed with this version of VidSail is
identified by its distributor as licensed under the GNU General Public
License Version 3.

VidSail calls FFmpeg and FFprobe as separate external executable files.
SALNEX does not claim ownership of FFmpeg, FFprobe, their source code, or
their included libraries.

Project, source, build, and licence information:
https://ffmpeg.org
https://ffmpeg.org/legal.html
https://github.com/FFmpeg/FFmpeg
https://github.com/FFmpeg/FFmpeg/blob/master/LICENSE.md
https://www.gyan.dev/ffmpeg/builds/
https://github.com/BtbN/FFmpeg-Builds
https://www.gnu.org/licenses/gpl-3.0.html

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2. YT-DLP
=======================================================================

Component:
yt-dlp

Purpose:
Website information extraction, media information retrieval, and media
download engine.

Bundled Windows version:
2026.07.04

Bundled Windows file:
bin/yt-dlp.exe

Bundled Linux version:
2026.07.04

Bundled Linux file:
bin/yt-dlp

Linux architecture:
x86_64

Licence notice:
The main yt-dlp project source is provided under the Unlicense.

However, the official Windows standalone executable is built using
PyInstaller and includes code from additional third-party projects. The
combined Windows executable contains GPLv3-or-later licensed code and is
therefore distributed under GPLv3-or-later terms.

The official yt-dlp release also provides a THIRD_PARTY_LICENSES.txt file
containing notices for components included in its standalone executables.

VidSail uses yt-dlp as a separate external executable. SALNEX does not
claim ownership of yt-dlp or any third-party component included in the
yt-dlp executable.

Project, source, and licence information:
https://github.com/yt-dlp/yt-dlp
https://github.com/yt-dlp/yt-dlp/blob/master/LICENSE
https://github.com/yt-dlp/yt-dlp/blob/master/THIRD_PARTY_LICENSES.txt
https://www.gnu.org/licenses/gpl-3.0.html

=======================================================================
3. DENO
=======================================================================

Component:
Deno

Bundled Windows version:
2.9.3

Bundled Linux version:
2.9.4

Purpose:
JavaScript and TypeScript runtime used by yt-dlp when supported websites
require JavaScript challenge processing, including certain YouTube
extraction operations.

Bundled Windows file:
bin/deno.exe

Bundled Linux file:
bin/deno

Linux architecture:
x86_64

Licence notice:
Deno is distributed under the MIT License.

Copyright 2018-2026 the Deno authors.

VidSail calls Deno as a separate external executable file. SALNEX does
not claim ownership of Deno, its source code, or third-party components
included in the Deno executable.

The unmodified official Deno licence notice must be distributed with the
bundled Deno executable.

Project, source, documentation, and licence information:
https://deno.com
https://docs.deno.com/runtime/
https://github.com/denoland/deno
https://github.com/denoland/deno/blob/main/LICENSE.md

=======================================================================
4. PYTHON
=======================================================================

Component:
Python

Bundled Linux runtime version:
Python 3.13.7

Linux architecture:
x86_64

Purpose:
Programming language and embedded runtime used by the packaged VidSail
application.

Licence notice:
Python is provided under the Python Software Foundation Licence Version 2
and other applicable historical licence terms described by the Python
Software Foundation.

SALNEX does not claim ownership of Python.

Project, source, and licence information:
https://www.python.org
https://docs.python.org/3/license.html
https://github.com/python/cpython

=======================================================================
5. PYSIDE6, QT FOR PYTHON, AND SHIBOKEN6
=======================================================================

Components:
- PySide6 6.11.1
- PySide6_Addons 6.11.1
- PySide6_Essentials 6.11.1
- shiboken6 6.11.1
- Qt libraries and plugins included by PySide6

Bundled Linux architecture:
x86_64

Linux packaging:
PySide6, Qt, Shiboken, and the required Qt libraries and plugins are
included within the Nuitka standalone VidSail application bundle.

Purpose:
Cross-platform graphical user interface framework, Qt bindings, supporting
libraries, and Qt integration.

Licence notice:
Qt for Python and PySide6 are available under applicable open-source
licences, including LGPLv3 and GPLv3 terms, or under applicable Qt
commercial licence terms.

Qt for Python and the Qt libraries may also contain third-party software
provided under additional open-source licences. Those components remain
subject to their own licence and attribution requirements.

VidSail uses the PySide6 Community Edition packages installed through the
Python package system. SALNEX does not claim ownership of PySide6, Qt,
Shiboken, or their included third-party components.

Project, source, licence, and third-party notice information:
https://doc.qt.io/qtforpython-6/
https://doc.qt.io/qtforpython-6/licenses.html
https://code.qt.io/cgit/pyside/pyside-setup.git/
https://pypi.org/project/PySide6/
https://www.qt.io/licensing/

=======================================================================
6. PYTHON RUNTIME PACKAGES
=======================================================================

The following Python packages are used directly by VidSail and may be
included in the packaged application.

-----------------------------------------------------------------------
6.1 PSUTIL
-----------------------------------------------------------------------

Component:
psutil 7.2.2

Purpose:
Process management, child-process discovery, cancellation, pause, resume,
safe process cleanup, and application memory statistics.

Project and licence information:
https://github.com/giampaolo/psutil
https://pypi.org/project/psutil/

-----------------------------------------------------------------------
6.2 PACKAGING
-----------------------------------------------------------------------

Component:
packaging 26.2

Purpose:
Version parsing and comparison for application and engine update checks.

Project and licence information:
https://github.com/pypa/packaging
https://pypi.org/project/packaging/

Each package listed above is provided under its respective licence terms.
SALNEX does not claim ownership of these packages.

=======================================================================
7. APPLICATION PACKAGING TOOLS
=======================================================================

The build tools listed in this section are used to create packaged VidSail
applications for supported operating systems. They are build-time tools
and are not part of VidSail's application source code.

-----------------------------------------------------------------------
7.1 PYINSTALLER - WINDOWS
-----------------------------------------------------------------------

Component:
PyInstaller 6.21.0

Platform:
Windows

Purpose:
Creation of the packaged Windows VidSail application.

Licence notice:
PyInstaller is distributed under the GNU General Public License Version 2
with a special exception that permits applications built with PyInstaller
to be distributed under their own applicable licence terms.

The packaged Windows VidSail application includes PyInstaller-generated
bootloader and runtime files. PyInstaller and its supporting build
dependencies are used during the build process and are not part of
VidSail's application source code.

Project and licence information:
https://pyinstaller.org
https://pyinstaller.org/en/stable/license.html
https://github.com/pyinstaller/pyinstaller

-----------------------------------------------------------------------
7.2 NUITKA - LINUX
-----------------------------------------------------------------------

Component:
Nuitka 4.1.3

Platform:
Linux x86_64

Purpose:
Compilation and creation of the standalone Linux VidSail application
bundle used for Linux distribution packages.

Licence notice:
Nuitka is distributed under the GNU Affero General Public License
Version 3 with a runtime exception for binaries created using Nuitka.

The Nuitka runtime exception allows applications compiled with Nuitka
to be distributed without imposing the AGPLv3 licence requirements on
the user's application code or on the resulting application binaries.

The packaged Linux VidSail application may include Nuitka-generated
runtime and support files required by the standalone application bundle.
Nuitka and its supporting build dependencies are used during the build
process and are not part of VidSail's application source code.

SALNEX does not claim ownership of Nuitka.

Project, source, and licence information:
https://nuitka.net
https://nuitka.net/doc/download.html
https://github.com/Nuitka/Nuitka
https://www.gnu.org/licenses/agpl-3.0.html

=======================================================================
8. THIRD-PARTY LICENCE RIGHTS
=======================================================================

Nothing in the VidSail End User Licence Agreement is intended to replace,
restrict, override, or remove any right granted to a user under an
applicable third-party open-source licence.

Where a third-party licence grants rights to copy, modify, replace,
reverse engineer for debugging, relink, redistribute, or obtain source
code for that third-party component, those rights remain governed by the
applicable third-party licence.

The VidSail End User Licence Agreement applies to VidSail itself and does
not change the licence terms of separately licensed third-party software.

=======================================================================
9. SOURCE CODE AND LICENCE INFORMATION
=======================================================================

Source code and licence information for third-party components can be
obtained from the official project links listed in this document.

Where an applicable third-party licence requires additional source-code
availability, written offers, licence copies, notices, attribution,
replacement rights, or relinking information, those requirements apply
independently of the VidSail End User Licence Agreement.

Users requiring information about a component included in a particular
VidSail release may contact:

Website:
https://vidsail.com

Support:
https://vidsail.com/support

Email:
support@vidsail.com

=======================================================================
10. NO ENDORSEMENT
=======================================================================

The inclusion, bundling, use, or reference to a third-party component does
not imply that VidSail or SALNEX is endorsed, sponsored, certified, or
approved by the authors, maintainers, contributors, distributors, or
rights holders of that component.

Likewise, VidSail and SALNEX do not endorse or claim responsibility for
third-party projects except for SALNEX's own decisions regarding which
components are distributed with or called by VidSail.

=======================================================================
11. NOTICE MAINTENANCE
=======================================================================

Third-party versions, build configurations, packaging tools, and licence
terms may differ between supported operating systems and may change when
VidSail, its Python dependencies, FFmpeg, FFprobe, yt-dlp, Deno, or other
components are updated.

This file should be reviewed and updated whenever a bundled component,
runtime dependency, engine executable, build configuration, or package
version changes.

Copyright © 2026 SALNEX. All rights reserved in VidSail-specific material.

Third-party names, product names, project names, trademarks, copyrights,
and licence rights remain the property of their respective owners.