Lenny RachitskyHost of Lenny's Podcast | Author of Lenny's Newsletter

How Codex learnt to edit videos

5 Jul 2026 · 1 min

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Brent, a videographer, used OpenAI's Codex to automate video editing in Adobe Premiere Pro. Codex generated its own Premiere Pro extension to place markers in the timeline, letting it edit videos through code without being designed for video work at all.

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We had some videos that we shot in this room for the original launch of the Codex app. Our in-house DX videographer, Brent, he edited all the videos with Codex, which was one of the early, whoa, what are people doing with this thing, right? He started just because he was curious if Codex could edit videos. Codex is not a video editor per se. It doesn't have any of that UI in it. It was able to understand that he used Premiere Pro. So naturally what Codex then did was built itself an extension that could be installed into Premiere Pro that it could then talk to and say, "Hey, Premiere Pro extension, can you please change this marker?" inside of the Premiere Pro app. That was pretty nuts when we saw that happening.