AI voiceover

For faceless video this is the piece that makes daily posting possible. Recording narration is the step that needs a quiet room, a microphone and a retake whenever a sentence lands badly. Generating it needs a script.

Why the timing data matters more than the voice

A speech model returns the audio and, in most modern pipelines, the exact start and end time of every word. Captions built from that timing land on the spoken word instead of drifting. Captions estimated from an average reading speed drift within about 15 seconds, which is the most common reason a faceless video feels cheap. See auto captions and subtitle burn-in.

Choosing a voice

• Speed over character. Short-form narration usually runs slightly faster than natural speech. Most creators land between 1.1x and 1.3x.
• Consistency. Use the same voice across a channel. Viewers recognise it before they recognise the thumbnail.
• Two voices for dialogue. Chat and interview formats need one per side. See fake text story video.

The rules to know

YouTube requires disclosure of realistic synthetic content in the cases its policy covers, and impersonating a real person's voice is a separate problem regardless of platform. A generated voice reading your own script is normal practice. A generated clone of a named celebrity is not.

MakeViral generates the voiceover and builds the captions from the returned character timings rather than estimating them. See the AI voiceover video generator.