VidBook
Winner — OpenAI × Outskill AI Builders Hackathon 2026

The AI publishing studio for long-form knowledge.

VidBook turns long-form YouTube videos into KDP-ready books, lead magnets, and digital products. It exists because the gap between recording a great talk and publishing a book from it is six to twelve weeks of ghostwriter work — a gap most creators never close.

Why VidBook exists

Most creators are already sitting on hours of high-conversion video. A coach has fifty signature talks on YouTube. A podcaster has two hundred evergreen episodes. A pastor has a year of sermons. Each of those bodies of work would make a good book, but the traditional path — ghostwriter, developmental editor, designer, formatter — is so expensive and slow that most never become books.

VidBook compresses that path into ten minutes. Paste a YouTube URL. A multi-agent pipeline grounds each chapter in transcript chunks (no hallucination), a humanizer strips AI tells (no "as a large language model"), and a renderer outputs a KDP-ready PDF, EPUB, and DOCX. You spend the saved weeks on distribution and audience, not on prose mechanics.

The grounded pipeline

Six agents, each with one job. An architect maps the transcript to a chapter outline. A chapter planner specifies what each chapter must accomplish. A chapter writer drafts each chapter using only the relevant transcript chunks and a summary of prior chapters for continuity. A refiner scores the draft and rewrites weak sections. A humanizer strips 30+ AI-tell patterns. A composer assembles the manuscript and renders it.

We picked this architecture because one-shot LLM prompting fails at long-form coherence. A 50,000-word book asked of a single prompt forgets early chapters, contradicts itself, and invents facts. The multi-agent pipeline is slower (six to ten minutes versus two to three) but the output is publishable on the first try.

The hackathon

VidBook was built during the OpenAI × Outskill AI Builders Hackathon 2026 and selected as one of five winners from roughly a thousand submissions. The announcement is on LinkedIn. The product is live at vidbook.co and used by a growing roster of coaches, course creators, podcasters, and pastors.

What we won’t build

VidBook is a publishing pipeline. It will not become a generic chatbot, a course platform, an Amazon KDP uploader, or a marketing-asset generator. The product surface is intentionally narrow so each step does one thing well. If your problem is short-form marketing assets or one-off prompts, other tools are a better fit.

Press, mentions, and where to find us