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YouTube Tests AI Lip-Sync for Auto-Dubbed Videos

The tool edits visible mouth movements to align with translated speech.

Overview

  • YouTube confirmed a limited rollout to select creators, with no commitment yet on broader availability.
  • The system modifies mouth pixels using 3D-aware facial modeling to produce realistic synchronization with dubbed audio.
  • Initial access covers English, Spanish, German, Portuguese and French, with stated plans to expand to all 20 auto-dub languages.
  • Processing is optimized for 1080p uploads and is not fully tuned for 4K footage at this stage.
  • Reports note possible additional fees and renewed questions about disclosure after past AI enhancements, as Meta tests a comparable feature on Reels.