How to Rebuild a Website UI From Video With Gatsby and Replay AI in 2026

TL;DR: Rebuild any website UI from a video recording in seconds using Replay, generating production-ready Gatsby code with integrated behavior analysis and Supabase support.

The year is 2026. Design sprints are shorter, user testing is faster, and iterating on your product is happening in real-time. But what happens when you need to quickly replicate a UI you saw in a demo video, a competitor's walkthrough, or even a recording of your own user's behavior? Screenshot-to-code tools fall short because they lack context. They can't understand the intent behind the clicks, scrolls, and form submissions. That's where Replay comes in.

Introducing Behavior-Driven Reconstruction#

Replay is a video-to-code engine that uses advanced AI, powered by Gemini, to reconstruct working UI from screen recordings. Unlike traditional screenshot-to-code tools, Replay analyzes video to understand user behavior and intent. This "Behavior-Driven Reconstruction" allows it to generate functional, multi-page applications, complete with data integration and styling.

Think of it as turning a video of a user flow into a fully functional Gatsby application, ready to be deployed.

Why Video is the Source of Truth#

Screenshots are static. They capture a moment in time, but they miss the crucial context of user interaction. Video, on the other hand, provides a complete record of user behavior, including:

• •Mouse movements
• •Keystrokes
• •Scroll events
• •Page transitions

This rich data allows Replay to understand what the user is trying to do, not just what they see. This is the key to generating accurate and functional code.

Rebuilding a Website UI with Gatsby and Replay: A Step-by-Step Guide#

Let's walk through the process of rebuilding a website UI from a video using Replay and Gatsby.

Step 1: Capture the Video#

The first step is to capture a video recording of the UI you want to rebuild. This could be a screen recording of a user interacting with an existing website, a demo video, or even a recording of your own design prototype.

💡 Pro Tip: Ensure the video is clear and well-lit. The better the video quality, the more accurate the reconstruction will be. Also, narrate the steps you are taking. This helps Replay to better understand the context.

Step 2: Upload to Replay#

Once you have the video, upload it to the Replay platform. Replay supports a variety of video formats, including MP4, MOV, and WebM.

Step 3: Analyze and Configure#

Replay will automatically analyze the video and identify the key UI elements and user interactions. You can then configure the reconstruction process by specifying:

• •The target framework (Gatsby in this case)
• •The desired styling approach (CSS modules, Styled Components, etc.)
• •Data integration settings (Supabase connection details)
• •The desired level of interactivity

Step 4: Generate the Code#

With the configuration complete, Replay will generate the Gatsby code for the UI. This includes:

• •React components for each UI element
• •Gatsby pages for each screen in the video
• •Data fetching logic for interacting with Supabase (if configured)
• •Styling based on the chosen approach

Step 5: Deploy and Customize#

Once the code is generated, you can download it and deploy it to your Gatsby environment. You can then customize the code to your specific needs, adding new features, refining the styling, and integrating with other services.

typescript
// Example Gatsby page component generated by Replay
import React, { useState, useEffect } from 'react';
import { supabase } from '../utils/supabaseClient';
import styles from './index.module.css';

const IndexPage = () => {
  const [data, setData] = useState([]);

  useEffect(() => {
    const fetchData = async () => {
      const { data, error } = await supabase
        .from('items')
        .select('*');

      if (error) {
        console.error('Error fetching data:', error);
      } else {
        setData(data);
      }
    };

    fetchData();
  }, []);

  return (
    <div className={styles.container}>
      <h1>Welcome to my Replay-generated Gatsby site!</h1>
      <ul>
        {data.map(item => (
          <li key={item.id}>{item.name}</li>
        ))}
      </ul>
    </div>
  );
};

export default IndexPage;

This code snippet demonstrates a simple Gatsby page component generated by Replay. It fetches data from a Supabase database and displays it in a list. The styling is handled using CSS modules, as specified in the configuration.

Replay Features: Beyond Screenshot-to-Code#

Replay offers a range of features that go beyond traditional screenshot-to-code tools:

• •Multi-page generation: Replay can generate entire multi-page applications from a single video.
• •Supabase integration: Replay can automatically integrate with Supabase to handle data storage and retrieval.
• •Style injection: Replay can inject styles based on the chosen approach (CSS modules, Styled Components, etc.).
• •Product Flow maps: Replay generates flow maps from the video data, allowing easy visualization of user paths.

Replay vs. Traditional Tools: A Detailed Comparison#

Let's compare Replay to traditional screenshot-to-code tools and even newer text-to-code solutions:

This table highlights the key advantages of Replay over traditional tools. Replay's ability to analyze video and understand user behavior allows it to generate more accurate, functional, and maintainable code.

Addressing Common Concerns#

Here are some common concerns about using video-to-code tools like Replay:

• •Privacy: Replay processes video data on secure servers and adheres to strict privacy policies. You have full control over your video data and can delete it at any time.
• •Accuracy: While Replay is highly accurate, it's not perfect. The generated code may require some manual adjustments to fine-tune the functionality and styling.
• •Complexity: Replay is designed to be easy to use, even for non-technical users. The platform provides a user-friendly interface and clear instructions.

📝 Note: Replay is constantly being improved and refined. New features and enhancements are added regularly to address user feedback and improve the overall experience.

Replay: The Future of UI Development#

Replay represents a significant leap forward in UI development. By leveraging the power of video analysis and AI, Replay enables developers to quickly and easily rebuild existing UIs, prototype new designs, and iterate on their products faster than ever before. The ability to capture user behavior directly from video and translate it into working code is a game-changer for the industry.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited features. Paid plans are available for users who need more advanced functionality and higher usage limits.

How is Replay different from v0.dev?#

v0.dev uses text prompts to generate UI components. Replay uses video analysis to understand user behavior and reconstruct entire multi-page applications. Replay focuses on replicating existing UIs and understanding user flows, while v0.dev focuses on generating new UI designs from scratch.

What frameworks does Replay support?#

Currently, Replay supports React (with Gatsby and Next.js), Vue.js, and HTML/CSS. Support for other frameworks is planned for the future.

What kind of videos work best with Replay?#

Clear, well-lit videos with minimal background noise work best. Videos should focus on the UI and user interactions. Narrating the steps taken in the video can also improve accuracy.

Can I use Replay to rebuild mobile app UIs?#

Yes, Replay can be used to rebuild mobile app UIs from screen recordings of mobile devices.

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Ready to try behavior-driven code generation? Get started with Replay - transform any video into working code in seconds.