Downloady: third party software notices

Downloady is developed by Ly Qui Chung / 56KGen. The Downloady source and
brand assets are separate from the third party components listed below.

Direct components:
  curl 8.23.0: curl license; statically linked; curl-LICENSE.txt
  nlohmann/json 3.12.0: MIT; header only; nlohmann-json-LICENSE.txt
  FFmpeg n9.0.2-47-gb204e94e90: LGPL-3.0-or-later build; separate process
      FFmpeg-LGPLv3.txt, GPL-3.0.txt, FFMPEG-NOTICE.txt

FFmpeg uses shared libraries in media/. Downloady communicates with it using
process arguments and pipes, not linked library calls.
These helpers run only while needed and may be replaced with compatible
versions. Downloady imposes no restriction on modifying or reverse engineering
these third party components for debugging such modifications.

Exact download URLs, checksums, source references and observed FFmpeg build
configuration are in THIRD-PARTY.json, generated from pinned dependencies and
the actual packaged executable. This is an inventory, not an SPDX certified
complete transitive SBOM or a legal opinion.

FFmpeg Source Code Provision:
Downloady uses a pre-compiled, unmodified FFmpeg build from BtbN.
FFmpeg source references and build scripts for this build are available from
its original maintainers at:

FFmpeg source, revision b204e94e90fca64045e9ca7dd44c65678c7eb29e:
https://github.com/FFmpeg/FFmpeg/tree/b204e94e90fca64045e9ca7dd44c65678c7eb29e

Build scripts, revision c63bb308a1de656b425c132a8102f8fd5389afc5:
https://github.com/BtbN/FFmpeg-Builds/tree/c63bb308a1de656b425c132a8102f8fd5389afc5

Included dependency source locations and build recipes:
https://github.com/BtbN/FFmpeg-Builds/tree/c63bb308a1de656b425c132a8102f8fd5389afc5/scripts.d

Original binary release:
https://github.com/BtbN/FFmpeg-Builds/releases/tag/autobuild-2026-11-06-12-50

Downloady's own source code remains proprietary and closed-source.
The licenses and notices of the third party components continue to apply.

Downloady does not decrypt DRM. Users are responsible for permission to download
the content they select. This note grants no rights to third party media.

SABR protocol field definitions referenced from LuanRT/googlevideo (MIT), revision c0e73b283310c771cddc5af8993f0e6b55a7578e.
https://github.com/LuanRT/googlevideo
Downloady implements its own C++ wire codec/transfer state machine; googlevideo is not a runtime dependency. See SABR-protocol-MIT.txt.