Use case · Courses and lectures
One recorded class, a series of short lessons.
Lectures, webinars and livestream replays hold dozens of ideas that work on their own. Reelfold finds them, keeps the code and slides readable in a vertical frame, and numbers the clips as a series.
macOS app coming soon · MIT licensed · works today as a Claude Code skill
Built for screens full of text
Readable code and slides
Vertical slices crop and zoom the part of the screen that matters, so a line of code survives a phone screen.
A series, not a pile
Each clip gets a number, a series name and a title, so viewers can find the next one.
Notes panels
When the screen is static, a short notes panel carries the key point of the clip.
Private parts left out
Small talk, student questions and side conversations can be skipped, and screen regions excluded.
A real example
72 minutes in
One recorded lecture on retrieval-augmented generation, screen share plus voice.
24 clips planned
Each about a minute, picked for one clear point, with the off-topic parts left out.
96 files out
Four formats per clip: Xiaohongshu 3:4 and 9:16, Douyin and YouTube Shorts.
21 of 24 passed
Three were flagged for a person to check. The AI cost for the whole run was $0.73.
Questions
Questions, answered plainly.
Can I keep a long version too?
Yes. The same recording can become a cut course video with chapters as well as the short episodes.
What about student voices or faces?
Leave those parts out of the plan, exclude the screen region where they appear, or mask them. Ask before you publish anyone else.
Does it handle Chinese technical terms?
You can give the batch a glossary so terms like “chunk” or “reranker” are spelled the same way in every caption.
Related
Turn your next class into a series.
Free and open source. Your video stays on your Mac.
macOS app coming soon · MIT licensed · works today as a Claude Code skill