An AI agent made a demo video for a browser extension
In a firsthand test, handled a non-coding task: making a demo video with voiceover for a . The input was the extension’s and one short request to create the video. Fable 5 rebuilt the product interface as animated HTML using the existing CSS.
When services were blocked inside its sandbox, it used the person’s Chrome browser to download a neural and moved the file through Finder. When headless Chromium failed because a system library was missing, it found the missing symbols, wrote a 4-line C stub, and compiled it. It then rendered 1,296 frames, narrated 8 scenes, and used ffmpeg to assemble a 54-second 1080p video.
The whole job took about 30 minutes, with human input limited to 4 multiple-choice answers and dragging one file.
Key points
- created a demo video from a ’s .
- It rebuilt the interface as animated HTML and added voiceover.
- It worked around blocked access and a headless Chromium failure.
- It produced a 54-second 1080p video in about 30 minutes.
- Human input was limited to 4 multiple-choice answers and moving one file.