YouTube Access Pro bundles the following third-party components
in globalPlugins/lib. They are not covered by this add-on's own
license; each remains under its own upstream license.

- yt-dlp (globalPlugins/lib/yt_dlp), version 2026.07.04
  https://github.com/yt-dlp/yt-dlp
  License: Unlicense (public domain)

- FFmpeg / FFprobe (globalPlugins/lib/ffmpeg)
  Build: "essentials" build dated 2025-08-25 (git 1b62f9d3ae) from
  https://www.gyan.dev/ffmpeg/builds/ (essentials_build)
  https://ffmpeg.org
  License: GNU General Public License (GPL) v3 or later. This
  specific build is compiled with --enable-gpl --enable-version3,
  which places every FFmpeg library in this build (libavcodec,
  libavformat, libavfilter, libavdevice, libavutil, libswresample,
  libswscale) under GPL v3+, not LGPL. Corresponding source for this
  exact build is available from the gyan.dev FFmpeg builds page
  above, or from https://ffmpeg.org/download.html for the underlying
  FFmpeg project source.

- mpv (globalPlugins/lib/mpv/mpv.exe)
  Version: 0.28.0
  https://mpv.io
  License: GNU Lesser General Public License (LGPL), as reported by
  the bundled binary itself. Corresponding source for the mpv
  project is available from https://github.com/mpv-player/mpv.
  Note: this is an older mpv release (originally published in
  2017). It has not been updated since this add-on's playback
  feature was first built, because every prior change touching
  playback in this project has carried real regression risk that
  could not be verified without a live NVDA/Windows test pass (see
  DEV_NOTES.md). Upgrading this binary is tracked as a deferred,
  separate piece of work, not a correctness issue with the add-on's
  own code.

- youtube-dl (globalPlugins/lib/mpv/youtube-dl.exe)
  https://github.com/ytdl-org/youtube-dl
  License: Unlicense (public domain)
  This is not invoked directly by this add-on's own code (single-item
  playback, and downloads, resolve and fetch media through the
  bundled yt-dlp library above). It is required by mpv's own built-in
  "ytdl_hook" script, which mpv uses internally to resolve each entry
  of a playlist file (.m3u) handed to it for multi-item playback (for
  example, playing a whole saved playlist or a channel's Subscriptions
  list back to back). mpv looks for an external helper program named
  "youtube-dl" next to its own executable to do this; without it
  present, mpv cannot play any item from a playlist file at all. This
  file must stay in this exact folder for playlist playback to work.

- d3dcompiler_43.dll (globalPlugins/lib/mpv)
  A Microsoft Direct3D shader-compiler redistributable used by mpv's
  Direct3D video output on Windows. Distributed under Microsoft's
  own redistributable terms as part of the DirectX End-User Runtime,
  not under FFmpeg/mpv's GPL/LGPL terms. Not modified by this
  add-on.

Redistributing GPL/LGPL-licensed binaries alongside this add-on does
not change the license of this add-on's own source code, which is
released under the GPL v2 as required by NVDA add-on policy.

This package no longer bundles mpv's own mpv.com helper or the
libaacs.dll/libbdplus.dll Blu-ray Disc DRM libraries that shipped
with earlier builds of mpv's Windows release - neither of those two
is ever invoked by mpv.exe itself or by this add-on's own code, so
they were removed as unused dead weight.
