I created an audio-synchronized landing page using Sites.

📌 We tried creating an introductory video using the GPT-6 Astra to control our company website. We were able to demonstrate language switching and text-to-speech, but we couldn't complete a finished version with explanatory narration. I'll write about what we learned along the way.

Introduction

Actually, my weekly limit for Claude Code has come up, and I won't be able to resume development, writing articles, and other things until next week, so I thought I'd try something using the much-talked-about "GPT-6 Astra".
This article describes how, after asking someone who apparently could operate the screen to do so, we ended up filming the process, which turned out to be quite a challenge due to various issues.
This time, I created everything—videos, note articles, header images, and inserted images—using "GPT-6 Astra".

📝 I thought that if I could operate it, I could also record.

The conversation with Astra

🔹 Initially, we asked for a 30-second introductory video.

The initial idea was a simple 30-second video demonstrating the homepage, language switching, and text-to-speech functionality. I figured that if the AI could control the website, it could also handle recording the process.