YouTube automatic dubbing (Help Center, Oct 2026): eligibility exclusions (over 120 min, little speech, unsupported/undetected language, too-fast speech, copyrighted content), language pairs, expressive speech, manual-review setting and experimental lip sync

Per YouTube Help (R1): automatic dubbing generates translated audio tracks, labelled "auto-dubbed" in the description; viewers get their preferred audio language or can switch tracks. It is on by default for eligible creators; new uploads are dubbed automatically and published according to the channel's publication setting, and YouTube "may also generate dubs for previously published videos". A video is ineligible if it exceeds 120 minutes, has no/little speech or only music, is in an unsupported or undetectable source language, has speech too fast to dub without an unlistenable speed-up, or contains copyrighted content. Accuracy depends on setting the correct original video/channel language; dubs cannot be edited - fixing the original language triggers regeneration. Language support is asymmetric: English originals can be dubbed into ~20 languages (Arabic, Bengali, Dutch, French, German, Hebrew, Hindi, Indonesian, Italian, Japanese, Korean, Malayalam, Polish, Portuguese, Punjabi, Russian, Spanish, Tamil, Telugu, Ukrainian), while most other originals dub only into English (a few extra pairs: Hindi->Bengali, Korean->Indonesian, Portuguese->Spanish, Spanish->Arabic/Portuguese). Asterisked targets support "expressive speech" (replicates pitch and intonation) but it "won't always be used". Creators can switch to "Publish manually" to review dubs first (mobile Studio setting); preview, transcript review, publish/unpublish/delete are desktop-Studio only; a deleted dub cannot be republished. An experimental "lip sync" option alters the speaker's lip movement to match the dub, early access for select channels and qualifying videos/languages (Settings > Channel > Advanced). Workflow implications: set language metadata before upload; keep speech pacing moderate and reduce music-only/background-noise segments if dubbing reach matters; use manual review for brand or technical content because proper nouns, idioms and jargon are named failure areas; for AI-generated or synthetic presenters, auto-dubbing plus lip sync means the platform itself will create additional synthetic speech and altered lip movement of the on-screen person. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Undated YouTube Help page as served 2026-10-23; availability changes frequently. Limitations: Help page undated; language table and lip-sync availability change frequently ("some channels might have access to new languages sooner"); per-video availability is authoritative in Studio > Languages. No measured effect on views or watch time stated on this page. Visual Studio UI not inspected. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://support.google.com/youtube/answer/15569972?hl=en",
      "note": "Eligibility; Automatic dubbing best practices; Lip sync; Available languages note"
    }
  ]
}