END USER LICENCE AGREEMENT

Transcript for YouTube (the "Extension")
Publisher: Nocturne Voss, an independent studio based in France
("we", "us", "our")
Version 1.6.0
Last updated: 25 August 2026


1. WHAT THIS IS

This is the agreement between you and Nocturne Voss covering your use of the
Extension. It is short on purpose. The Extension is free, it has no account, it
has no server, and it collects nothing about you, so most of what a licence
usually has to arrange does not arise here.

By installing or using the Extension you accept this agreement. If you do not
accept it, do not install the Extension, and remove it if it is already
installed.


2. LICENCE GRANT

We grant you a worldwide, royalty-free, non-exclusive, non-transferable,
revocable licence to install and use the Extension on any browser and any
device that you own or control, for your own purposes, personal or commercial,
for as long as this agreement is in force.

No fee is charged for this licence, now or later, for the version you have
installed.


3. WHAT YOU MAY DO

You may:

a. install the Extension on as many of your own browsers and devices as you
   wish;
b. use its output, meaning the transcripts and documents it produces, however
   you like, subject to section 6;
c. read, inspect and study the source code shipped inside the package. The
   Extension is distributed as plain, unminified JavaScript, CSS and HTML,
   with no bundler and no obfuscation, precisely so that anyone can verify what
   it does;
d. exercise any right granted to you by applicable law that this agreement
   cannot lawfully restrict, including the rights of observation, study and
   decompilation for interoperability under Directive 2009/24/EC and its
   national implementations.


4. WHAT YOU MAY NOT DO

You may not:

a. sell, rent, lease, sublicense or otherwise distribute the Extension or any
   part of it, whether modified or unmodified, whether for a fee or free of
   charge;
b. publish the Extension, or a derivative of it, to any extension store,
   package registry, code host or download site, under this name or any other;
c. remove, obscure or alter any copyright, trademark, authorship or licence
   notice contained in the package;
d. represent the Extension as your own work, or represent a modified copy as
   the official one;
e. use the Extension, or its name, in a way that suggests that Nocturne Voss
   endorses you, your product or your service;
f. use the Extension to break the law, to infringe anyone's rights, or in
   breach of the terms of service of any site or provider you direct it at,
   including YouTube's.

Nothing in this section prevents you from making a private backup copy or from
running a locally modified copy on your own machine for your own use.


5. OWNERSHIP

The Extension is licensed to you, not sold. Nocturne Voss retains all right,
title and interest in and to the Extension, its source code, its name, its
icons, its artwork and its documentation, except for the third-party material
described in section 11.


6. THE CONTENT YOU PROCESS

The Extension reads the caption track and metadata of videos you choose to open
it on. Those materials belong to their creators and to the platforms that host
them, not to us and not to you.

We grant you no rights whatsoever in that content. What you may lawfully do
with a transcript that the Extension produced for you is governed by copyright
law, by the platform's terms, and by any licence the creator applied, and it is
your responsibility to stay inside them. Reading a transcript for your own
study or research is a very different act from republishing it, and this
licence does not turn one into the other.


7. THIRD-PARTY MODEL PROVIDERS AND YOUR OWN KEYS

The AI-Ready mode works with no external service at all. It is generated
locally, in your browser, by code shipped in the package.

If you choose to connect a model provider in Settings, and only then, the
Extension sends the transcript and the video's title, channel and chapter list
from your browser directly to the provider you selected, using the API key you
supplied. Those providers are independent of us. Your use of them is governed
by your own agreement with them and by their own privacy policies. We are not a
party to that relationship, we receive nothing from it, and we are not
responsible for their availability, their output, their pricing or their
handling of your data.

You are responsible for the security of any API key you paste into the
Extension and for any charges your provider bills you for calls the Extension
makes on your instruction.

The option named "Nocturne Cloud" is a placeholder for a possible future hosted
plan. It has no default address and performs no action unless you select it and
supply an endpoint URL yourself. No such service is currently operating.


8. DONATIONS

The Extension may show a link to a voluntary support page, and, once, a link to
its store listing so you can leave a review. Any payment made on the support
page is a gift. It buys no licence, no feature, no service level and no support
obligation, and it is not refundable by us. Every feature described in this
agreement is available whether or not you give anything and whether or not you
leave a review. Nothing is unlocked by rating the Extension and nothing is
withheld for declining to.


9. PRIVACY

The Extension has no server, no account, no analytics and no telemetry, and it
transmits nothing about you to us. What it reads, what it stores locally, and
the one optional path on which data leaves your machine are all set out in the
privacy policy, which is part of this agreement by reference:

https://nocturnevoss.tech/extension/privacy.html


10. UPDATES

We may publish updated versions. Your browser's extension store may install
them automatically, according to your browser's own settings. An update is
covered by this agreement, or by the version of this agreement shipped with it.
We are under no obligation to publish updates, to maintain compatibility with
future versions of any browser or website, or to keep the Extension available.


11. THIRD-PARTY MATERIAL AND TRADEMARKS

The Extension bundles no third-party libraries, no frameworks and no fonts. All
code in the package was written for it.

YouTube and Google are trademarks of Google LLC. Anthropic, Claude, OpenAI,
ChatGPT, Gemini, OpenRouter, Chrome, Opera, Microsoft Edge, Brave and Firefox
are trademarks of their respective owners. They are used here only to say
truthfully what the Extension works with.

The Extension is not affiliated with, endorsed by, sponsored by or in any way
officially connected to YouTube, Google LLC, or any model provider named in it.


12. NO WARRANTY

The Extension is provided "as is" and "as available", without warranty of any
kind, express or implied, including any implied warranty of merchantability,
fitness for a particular purpose, accuracy or non-infringement.

In particular, and stated plainly because these are the real limits of what it
can do:

a. a video with no captions of any kind cannot be transcribed, because there is
   nothing to read;
b. automatic captions are produced by speech recognition and contain errors.
   The Extension is faithful to what the caption track says, which is not
   always what the speaker said. It does not invent corrections;
c. automatic captions carry no punctuation, so sentence boundaries are
   reconstructed from pauses and are approximate;
d. the Extension depends on YouTube's own pages and endpoints, which change
   without notice and may stop working at any time;
e. output from a connected model provider is generated by that provider and may
   be wrong. Do not rely on it for anything consequential without checking it.

We do not warrant that the Extension will be uninterrupted, error-free, or that
it will continue to function on any future version of any browser or website.


13. LIMITATION OF LIABILITY

To the fullest extent permitted by law, Nocturne Voss shall not be liable for
any indirect, incidental, special, consequential or punitive damages, nor for
any loss of profit, revenue, data, goodwill or anticipated saving, arising out
of or in connection with the Extension or this agreement, however caused and on
any theory of liability.

Our total aggregate liability arising out of or in connection with the
Extension is limited to the greater of the amount you actually paid us for it,
which is zero, and ten euros (EUR 10).

Nothing in this agreement excludes or limits our liability for death or
personal injury caused by our negligence, for fraud or fraudulent
misrepresentation, or for any other liability that cannot lawfully be excluded
or limited.


14. YOUR RIGHTS AS A CONSUMER

If you are a consumer, you have statutory rights that this agreement cannot
take away, and nothing here is intended to do so. Sections 12 and 13 apply only
so far as the law allows. Because the Extension is supplied free of charge and
without collecting any personal data, most consumer remedies concerned with
price and with data will simply have nothing to attach to, but the rights
themselves remain yours.


15. TERM AND TERMINATION

This agreement starts when you install the Extension and continues until it
ends.

You may end it at any time, for any reason, by uninstalling the Extension.
Uninstalling also deletes the settings and any API key stored on your machine.

We may end it if you materially breach section 4, in which case you must stop
using the Extension and remove it.

Sections 5, 6, 11, 12, 13, 16 and 17 survive the end of this agreement.


16. CHANGES TO THIS LICENCE

We may revise this agreement for future versions of the Extension. A revised
version is published with the version it applies to and carries a new date at
the top. The agreement that applies to you is the one shipped with the version
you are running. If you do not accept a revised agreement, do not install the
version it accompanies.


17. GOVERNING LAW

This agreement is governed by French law, without regard to its conflict of law
rules, and the courts of France have jurisdiction over any dispute arising from
it.

If you are a consumer resident in the European Union or the United Kingdom,
this choice of law does not deprive you of the protection of the mandatory
rules of the law of your country of residence, and you may also bring
proceedings in the courts of that country.

If any provision of this agreement is held unenforceable, it is severed and the
rest continues in force.


18. ENTIRE AGREEMENT

This agreement, together with the privacy policy referred to in section 9, is
the entire agreement between you and Nocturne Voss regarding the Extension, and
replaces anything said about it elsewhere.


19. CONTACT

Nocturne Voss, an independent studio based in France.

nocturne.voss@mail.ru
https://nocturnevoss.tech/en

The publisher's full identity and postal address are held on file by the
extension store this copy was installed from, and are provided to any competent
authority on request. Nothing about who publishes this extension is withheld
from anyone entitled to ask.


Copyright (c) 2026 Nocturne Voss. All rights reserved.
