AI Explainer Video Generator — from a topic to a narrated video

Honest split for Kenerate's Director:

• Automated: the script draft, the shot plan, each shot's render, the ElevenLabs narration placed per shot, the Ken Music bed (ducked under the narrator) and the final MP4. Captions are not in the export — Auto Subtitles adds them in one more pass.
• Yours: the topic and audience, checking every fact and number, approving or redoing shots, choosing the narrator voice and pressing Export.
• Not included: screen recording of your own software — add real screenshots as references (up to 4) or record your screen separately.

The same tool, three different jobs:

• Product explainer: 60–90 seconds, one problem and how the product solves it; Minimal or Cinematic look; end with one call to action.
• How-to: one task in numbered steps; Whiteboard or Illustrated look; on-screen text for each step.
• Training: 2–4 minutes, calm narration, captioned in Auto Subtitles (4 minutes per video at most); split longer courses into one video per topic so updates stay cheap.

W3C's WCAG 2.2 success criterion 1.2.2 asks for captions on all prerecorded audio in synchronized media — which covers almost every narrated explainer ^[2]. Many people also watch with the sound off. Director's export has no captions, so run it through Auto Subtitles — one pass for videos up to 4 minutes, the same as for any other video.

On YouTube, AI-written scripts, auto-generated captions and cloning your own voice for a voice-over are listed as not needing a synthetic-content label; realistic scenes that didn't happen, or real people appearing to say things they didn't, do ^[1].

From each vendor's own page, read on 22 October 2026 ^[3][4]:

• HeyGen: start from a script, PDF, slides, URL or prompt; an avatar presenter or animated scenes; 300+ voices; synced captions; HD or 4K MP4. It suggests 60–90 seconds for marketing and 3–5 minutes for training; the page lists no prices or maximum length.
• invideo AI: pick an actor, describe the video, then edit the script, music, voice-over and subtitles; 50+ languages and a large stock library. No length, price or watermark details on the page.
• Kenerate: a credit price before every render, four explainer looks, ElevenLabs narration, burned-in captions through Auto Subtitles (up to 4 minutes per video), up to 10 minutes per film, no watermark — and a presenter route that works without a paid plan.

A 60-second explainer about how our invoicing app sends automatic payment reminders, for freelancers who hate chasing clients. Cover: why late payments happen, how reminders are scheduled, what the client sees. Friendly, clear narration. Minimal look, 16:9.

A 90-second how-to on setting up two-factor authentication on any account, for non-technical adults. Cover: what 2FA is in one sentence, choosing an authenticator app, scanning the code, saving backup codes. Calm narration. Whiteboard look, 16:9.

A 2-minute training explainer on the three fire exits on our office floor, for new staff. Cover: where each exit is, the assembly point, what not to take with you. Calm, steady narration. Illustrated look, 16:9.

A clean 16:9 title card on an off-white background with the words "How 2FA keeps you safe" in large dark navy rounded sans-serif type, a simple flat padlock icon to the left, generous margins, no other text.

Ever wondered why your password alone isn't enough? Here's the idea in one sentence: two-factor authentication asks for something you know and something you have. First, you type your password, as usual. Second, your phone shows a six-digit code that changes every thirty seconds. Third, you enter that code, and only then are you in. So even if someone steals your password, they still don't have your phone. Set it up once, save your backup codes somewhere safe, and you're done.