A short video from one livestream and its transcript
A streamer gave Claude Opus a day’s stream and its transcript and asked for a polished short. The prompt is simple; what it leaves out is the useful part.
Abane (@AbaneChan), a Japanese streamer who broadcasts about stock trading, gave Opus two files, the video of that day’s YouTube stream and a transcript of it, and asked for one short video. The short they posted runs under a minute.
The post does not say which app or tools were used, how long it took, or whether anything was edited by hand afterward. The prompt is short enough to reuse as a template, and the rest of this note covers what it leaves out.
What the prompt asks for
It leaves the choice of content to the model and sets the bar instead: full captions, effects, a polished professional edit, and a length under one minute. The framing does most of the work. It asks for something like a showreel attached to a résumé, a short that proves what a good YouTube creator the model is and that people will want to watch, and it asks for full effort.
A brief to adapt
A shorter brief in our own words, built on the same idea. The original is linked below. Replace the bracketed parts.
Attached are a recording of my [stream or video] and its transcript. Choose the strongest moment and cut it into one vertical short under [60] seconds. Caption every line, and add motion graphics and sound effects where they help. Aim for the standard of a portfolio piece that would get an editor hired. Tell me which section you used and why.
Give it more signal
One reply suggested also supplying the live chat log, so the model can cut from the moments when the comments were busiest. That is a practical improvement: the transcript shows what was said, while chat activity hints at what viewers reacted to. Timestamps in both make it easier to line the cut up with the video.
Before you rely on it
Long video takes real processing, so check that your tool can read the whole file, render video, and hand it back. Review the captions for misheard words and the cut for context lost from the stream. If the stream shows other people, music, or on-screen material, confirm you have the right to reuse it in a short before posting.