Privacy

Updated 2026-09-27 · Deutsch

In short

• No advertising trackers. Google Analytics runs only if you accept it in the banner; until then no cookies are set.
• Nothing is sent to YouTube until you press play on a video.
• You can change your choice at any time via "Cookie settings" in the footer.
• Fonts, images and flags are served from this site, not from third parties.

Controller

Artem Boiko
Kraichgaustraße 3
76676 Graben-Neudorf
Germany
E-mail: info@datadrivenconstruction.io

Server logs

The site runs on a server in Germany. Like every web server, it records each request (IP address, time, requested address, browser identification, referring page) to keep the service running and secure (Art. 6(1)(f) GDPR). These logs are deleted after 14 days.

Storage in your browser

The site keeps a few settings in your browser's local storage, so they are there on your next visit. They never leave your device (§ 25(2) TDDDG, strictly necessary for the function you use):

• oca.lang: the interface language you chose
• oca.watch: which videos you watched and where you stopped (saved every few seconds while a video plays)
• oca.vsel, oca.sel: your last filters (country, role)
• oca.hint-dismissed: that a one-time hint has already been shown

You can delete them at any time in your browser's site settings, or here: Delete my saved settings

Language

The page picks its language in your browser: a language you chose, else your browser's language, else, for an English browser, the usual language of your country, read from your device's time zone. The time zone is not sent anywhere and a language picked this way is not saved; the page says so and offers English.

YouTube videos

Videos are hosted on YouTube (Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland). Before you press play, the page shows only a cover image from this site. When you press play, your browser loads YouTube's player script from youtube.com and the video from youtube-nocookie.com (privacy-enhanced mode). From then on YouTube receives your IP address and browser data, may store data in your browser, and processes it as described in Google's privacy policy. The legal basis is your consent by pressing play, after the notice under the player (Art. 6(1)(a) GDPR, § 25(1) TDDDG); each play is a new decision. Google may transfer data to the United States; Google LLC is certified under the EU–US Data Privacy Framework (adequacy decision, Art. 45 GDPR). Links to youtube.com open YouTube itself.

Google Analytics (only with your consent)

If you click "Accept" in the banner, the site loads Google Analytics 4 (Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland) to count which pages and lessons are used. Google sets the cookies _ga and _ga_* (up to 2 years) and receives your IP address, which GA4 does not store. Google signals and advertising features are off; data is kept for 14 months. Legal basis: your consent (Art. 6(1)(a) GDPR, § 25(1) TDDDG). Google may transfer data to the United States; Google LLC is certified under the EU–US Data Privacy Framework (Art. 45 GDPR). Your choice is kept in local storage (oca.consent). You can withdraw at any time: Cookie settings; the Analytics cookies are then deleted.

Your rights

You may ask for access to, correction, deletion or restriction of your data, object to its processing, and complain to a supervisory authority, for example the State Commissioner for Data Protection of Baden-Württemberg (LfDI BW).

Datenschutz (Deutsch)