Create a 5 minute educational video about T cells
Make it yours. Change "T cells" to your topic and "5 minute" to the length you want. Tell the agent to use the Remotion plugin as well, as the creator did.
Five-minute explainer on T cells
A 5:42 narrated lesson on T cells, made one-shot by GPT-6 Astra in Codex from a one-sentence prompt. Astra used the Remotion plugin, made the visuals with built-in image generation, and suggested HeyGen for the narration.
“assembled the entire educational video on its own one-shot, including what to say, how to explain it”
- Codex
- GPT-6 Astra
- Remotion
- Imagegen (built into Codex)
- HeyGen
- Remotion plugin
- One-shot
- $1–2 HeyGen
You'll need
- The Remotion plugin in Codex, plus an instruction to use it
- A HeyGen account for the narration
How it was made
The creator also told Astra to use the Remotion plugin; the wording of that instruction isn't published. Astra made the visuals with Codex's built-in Imagegen, suggested HeyGen for the narration (the creator signed up for it), then wrote the script and assembled the video on its own. The creator has studied T cells for 35 years.
A dollar or two of HeyGen speech on top of the subscription, according to the creator
Posted Sep 3, 2026 · X · 2.1k likes · 348k views · 92 comments
Prompt from: Post body, in quotes
Look notesby Reference
A seven-part slide lesson titled The Immune Team: short headlines beside textbook-style illustrations of cells and molecules, with quiz cards and subtitles.
- Color
- Warm cream backgrounds, dark slate text, and orange accents, with illustrated cells in violet-blue, coral red, and saffron.
- Type
- Heavy sans-serif headlines in short sentences, small orange capitals for section labels, a section counter (01 / 07) top right, and white subtitles on a dark slate bar.
- Framing
- Headline and two lines of body text on the left, an illustration or card on the right, and the subtitle bar along the bottom.
- Sound
- Narration made with HeyGen, according to the creator.
- Structure
- The cast of immune cells, thymus screening, the T-cell receptor reading a peptide on HLA, a meeting in a lymph node, a quiz card on activation signals, a killer T cell recognizing an infected cell, memory cells after the response winds down, a pause-and-think question, then the takeaway: Recognize. Respond. Remember.
