GDPR (General Data Protection Regulation) is the European Union's data-protection law, setting requirements for lawful processing of personal data: a legal basis (often consent), data-subject rights (access, deletion, portability), purpose limitation, breach notification, and significant fines for violations. It applies to any service handling EU residents' data, wherever the company is based.

For an OTT platform, which collects accounts, viewing behavior, payment, and device data, GDPR shapes consent flows, analytics and ad-tracking practices, data retention, and vendor agreements. It works together with viewing-specific rules like the VPPA and regional laws such as California's CCPA, making privacy engineering a cross-cutting requirement across personalization, advertising, and analytics.