AI avatar video — choosing by what the video has to prove

Three uses, three requirements

In training, what matters is that the content is accurate, not who is delivering it — a stock avatar is fine. In a product explainer, who is speaking carries the credibility, which is where cloning a real employee starts to matter. That difference drives the choice.

1. Judging stock avatars

• Mouth shapes in your target language — avatars tuned for English look wrong elsewhere
• Hands and upper body — completely still is uncanny, constant motion is distracting
• Blinking and gaze — perfectly regular intervals read as mechanical
• Wardrobe and background against your own brand

The first is the decisive one outside English. Most avatars are built around English phonemes, and sounds that do not exist in English leave the mouth out of sync. Always watch a sample in the language you will publish in; if the vendor only shows English demos, generate one in the trial.

2. Cloning a real person

Training a clone from a person's video and voice is offered by HeyGen among others. Filming an employee means documented consent and a decision, made in advance, about what happens after they leave.

• Written consent covering filming, training, scope of use and duration
• A procedure and an owner for deleting the avatar when they leave
• An approval process for scripts the person has not seen
• A policy on disclosing that the video is AI-generated

The third becomes a real problem. Once a clone exists, the person's face and voice can deliver a script they have never read. Without a named approver for external scripts, 'I never said that' is waiting to happen.

3. How they bill

Some sell a monthly subscription with included minutes; others meter usage. Hedra has no subscription — a prepaid balance is drawn down by output and tokens.

Steady monthly output suits a subscription; irregular production suits metering. Training video made in a burst twice a year wastes most of twelve monthly payments. If production is lumpy, use usage billing or subscribe only in the months you need.

4. Publishing in several languages

Generating one script into several languages is genuinely useful for training and manuals. Translation quality, though, is a separate problem from the video tool, and specialised or internal terminology gets mistranslated. Prepare the translation separately and let the tool only perform it.

Duration also changes between languages, which affects slide timing. The same content runs longer in some languages than others, so write on the assumption that timing is adjusted per language.

Frequently asked questions