What you get
The same video, in a language you do not speak
The script is translated, re-voiced, and the audio is re-fitted to the existing edit rather than pasted over it. A sentence that runs longer in the new language does not run past its scene.
Captions are regenerated in the new language too, because a dubbed video with the old subtitles is worse than no subtitles.
Twenty-seven languages, including the ones most videos actually get dubbed into: Spanish, Portuguese, French, German, Arabic, Japanese.
How Chitrio does this: Dubbing runs on a finished render or an upload, so videos you made elsewhere can be dubbed here.