---
title: "Ultrademo"
description: "Create a narrated demo video of a web app."
canonical: "https://potto.ai/skills/ultrademo"
language: "en"
dateModified: "2026-07-10"
---

# Ultrademo

Create a narrated demo video of a web app.

Create a narrated demo video of a web app. Use when the user asks for a demo video, product walkthrough video, launch video, or to re-run/update an existing one. Takes an app URL + test credentials + a content brief; produces an MP4 (plus vertical/GIF variants) via scout -> script checkpoint -> capture -> TTS -> render.

- Runs in: Claude Code, Codex, Cursor
- Output: MP4, GIF, SRT subtitles, Audio (MP3 / WAV)
- Needs: `ELEVENLABS_API_KEY`
- Generates with: Your agent's own model + ElevenLabs
- v2026.7.10 · by new-xp

## Ultrademo FAQ

What Ultrademo does, which agents run it, the keys it needs, and how to install it for free.

### What is the Ultrademo skill?

Ultrademo is a free agent skill by new-xp for making Launch videos. Create a narrated demo video of a web app.

### What does Ultrademo produce?

Ultrademo produces MP4, GIF, SRT subtitles, and Audio (MP3 / WAV).

### Which agents can run Ultrademo?

Ultrademo runs in Claude Code, Codex, and Cursor, or in any other agent that reads SKILL.md.

### Does Ultrademo need an API key?

Yes. Ultrademo needs ELEVENLABS_API_KEY, set in your agent's environment before you run it.

### How do I install Ultrademo?

Sign in, copy the install prompt for Ultrademo and paste it into your agent, or download its ZIP. Every skill on Potto is free.

### Which version of Ultrademo is on Potto?

Potto has Ultrademo v2026.7.10, updated Jul 10, 2026. Copy the install prompt again to get the latest version.