Privacy Policy of EURL Valerian Engineering - YouTube Summary website

Last updated: April 26, 2026

EURL Valerian Engineering operates youtubesummary.com and provides the YouTube Summary Service. This Privacy Policy explains how we collect, use, store, share, and protect information when you use the website, free tools, accounts, subscriptions, paid features, and related services (the "Service").

For the purposes of the General Data Protection Regulation (GDPR), Valerian Engineering is the data controller for personal data processed through the Service, except where a third-party provider acts as an independent controller under its own terms.

1. Information We Collect

Depending on how you use the Service, we may collect and process the following categories of information:

  • Technical data: IP address, browser type, device information, operating system, user agent, language, approximate location derived from IP address, pages visited, timestamps, logs, and diagnostic data.
  • Usage data: video URLs or IDs submitted, transcript extraction requests, summary requests, feature usage, rate limits, summary ratings, clicks, page views, errors, and performance events.
  • Account data: if accounts are available and you create or use one, we may process your email address, name or display name, profile image, authentication provider identifier, session data, subscription status, and account settings.
  • Payment and subscription data: plan selected, billing status, subscription period, invoices, customer identifiers, country, tax information, and limited payment metadata. Full card numbers are processed by payment providers such as Stripe and are not stored by us.
  • User content: prompts, URLs, feedback, ratings, support messages, and other content you submit to the Service.
  • Cookies and local storage: identifiers and preferences used to remember notices, maintain sessions, prevent abuse, and understand product usage.

2. How We Use Information

We use information for the following purposes:

  • To provide, operate, maintain, and improve the Service.
  • To generate summaries, transcripts, translations, rewritten summaries, and answers to video-related questions.
  • To manage accounts, authentication, sessions, subscriptions, billing, invoices, and access to paid features.
  • To enforce limits, prevent abuse, detect fraud, secure the Service, and troubleshoot errors.
  • To analyze usage, understand conversion and product performance, and improve user experience.
  • To respond to support, legal, security, or administrative requests.
  • To comply with legal obligations, tax rules, accounting requirements, and enforce our Terms of Service.

3. Legal Bases for Processing

Where GDPR applies, we process personal data under one or more of the following legal bases:

  • Contract: to provide the Service, account features, subscriptions, support, and paid functionality you request.
  • Legitimate interests: to secure the Service, prevent abuse, analyze usage, improve features, debug issues, and protect our rights, provided these interests are not overridden by your rights.
  • Consent: where required for optional cookies, marketing, or certain analytics choices.
  • Legal obligation: to comply with tax, accounting, consumer protection, security, and other legal requirements.

4. AI Processing and Third-Party Providers

The Service may send submitted video URLs, transcripts, prompts, text, and related metadata to AI providers and infrastructure providers so that summaries, translations, rewrites, and chat answers can be generated. We only send information that is necessary to provide, secure, and improve the requested functionality.

AI-generated outputs may be stored to provide summary pages, history, account features, debugging, quality improvement, and abuse prevention. Do not submit confidential, sensitive, or regulated information unless you are authorized to do so and accept the risks of processing it through third-party providers.

5. Cookies, Local Storage, and Analytics

We use essential cookies, local storage, and similar technologies to operate the Service, maintain sessions, preserve preferences, prevent abuse, and secure accounts. We may also use privacy-conscious anonymous identifiers and analytics to understand product usage, feature adoption, conversion, and errors.

Analytics data may include page views, events, referrers, approximate location, device/browser information, and interactions with features. We use this data to improve the Service and decide which free and paid features to build.

6. Payments and Subscriptions

If you purchase a paid subscription or paid feature, payment processing may be handled by a third-party provider such as Stripe. The payment provider may collect and process billing information, card details, tax information, fraud signals, and payment history under its own terms and privacy policy.

We may receive and store limited payment-related information such as customer ID, subscription status, plan, invoices, billing email, country, and transaction metadata to provide paid access, manage billing, comply with accounting and tax obligations, and handle support.

7. Service Providers

We may use third-party companies and individuals to:

  • Host, secure, monitor, and deliver the Service.
  • Provide AI processing, summarization, transcript processing, and related functionality.
  • Provide authentication, account, email, analytics, customer support, billing, and payment services.
  • Assist us in analyzing usage, debugging, preventing abuse, and improving the Service.

These providers may process information only as needed to provide their services to us, unless they act as independent controllers under their own terms. We choose providers that are expected to apply appropriate security and confidentiality measures.

8. International Transfers

Some providers may process data outside your country, including outside the European Economic Area. Where required, we rely on appropriate safeguards such as adequacy decisions, standard contractual clauses, contractual protections, or other lawful transfer mechanisms.

9. Data Retention

We retain data only for as long as reasonably necessary for the purposes described in this Privacy Policy, including providing the Service, maintaining public summary pages, account history, billing, security, legal compliance, accounting, dispute resolution, and abuse prevention.

Retention periods may vary depending on the type of data. For example, billing records may be kept for legal and accounting periods; logs may be kept for security and debugging; public summary pages may remain available unless removed; and account data may be retained while your account is active or as needed after deletion for legal or security reasons.

10. Security

We use commercially reasonable technical and organizational measures to protect information. However, no method of transmission over the internet or method of electronic storage is 100% secure. We cannot guarantee absolute security, and you use the Service at your own risk.

11. Your Rights

Depending on your location, you may have rights to access, correct, delete, restrict, object to, or receive a copy of your personal data, and to withdraw consent where processing is based on consent. You may also have the right to lodge a complaint with a data protection authority.

To exercise your rights, contact us at valerian+legal@dtdg.fr. We may need to verify your identity before responding. Some requests may be limited where data is needed for legal, security, fraud-prevention, accounting, or contractual reasons.

12. Account Deletion

If accounts are available, you may request deletion of your account. Deletion may remove or anonymize account data, but some records may be retained where required for billing, legal compliance, security, dispute resolution, or legitimate business purposes. Public summary pages, cached summaries, logs, backups, and aggregated analytics may not be immediately deleted where retention is necessary or technically required.

13. Children's Privacy

The Service is not directed to anyone under the age of 18. We do not knowingly collect personal information from children under 18. If you believe a child has provided personal information, contact us and we will take appropriate action.

14. Links to Other Sites

Our website may contain links to third-party websites or services. These third-party sites are not operated by us. We strongly advise you to review their privacy policies. We have no control over and assume no responsibility for third-party content, policies, or practices.

15. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page. Where required by law or where changes materially affect your rights, we may provide additional notice. Changes are effective when posted unless stated otherwise.

16. Contact Us

If you have questions or suggestions about this Privacy Policy, contact us at valerian+legal@dtdg.fr.