HeyGen Assistant by Zull

About

HeyGen Assistant by Zull is a Chrome extension that works directly inside app.heygen.com to help video creators split scripts, match backgrounds, and inject content into HeyGen scenes automatically.

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✅ WHAT IT DOES
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► Smart Script Splitting
Paste any script and the extension splits it into scenes at natural sentence boundaries. No manual cutting. No copy-pasting line by line. Supports up to 2,000 scenes in a single run.

► Auto Background Media
Every scene gets a relevant background automatically. The extension extracts keywords from each scene and fetches matching royalty-free images or videos from Pexels.

► One-Click Inject
After generating scenes and backgrounds, click Inject to fill all your HeyGen project scenes with script text and background media at once.

► Background Pattern Control
Choose how backgrounds are assigned:
- Images + Videos: alternates between image and video backgrounds
- Images Only: every scene gets a royalty-free image
- Videos Only: every scene gets a royalty-free video

► Split Mode Options
- Smart: splits at sentence boundaries, balanced across scenes
- Even: equal word count per scene
- Sentence: cuts only at punctuation marks

► Access Management
Users register with their name, receive a User ID, and are approved by the admin before gaining access. Free plan includes 2 uses.

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📋 HOW TO USE
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1. Open app.heygen.com and start a video project
2. Click the extension icon to open the side panel
3. Register your name and wait for admin approval
4. Paste your script into the Script box
5. Set the number of scenes and choose a split mode
6. Select a background pattern
7. Click Generate Scenes
8. Click Inject to fill your HeyGen project

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🔒 PERMISSIONS
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- activeTab & scripting: to interact with the HeyGen video editor
- tabs: to detect and communicate with the active HeyGen tab
- sidePanel: to display the assistant panel alongside HeyGen
- downloads: to download rendered video files
- webRequest: to detect video file URLs from HeyGen servers

This extension only works on app.heygen.com. It does not collect passwords, payment information, or browsing history.