youtube-upload

Upload a lesson video to YouTube and publish it. - run `node scripts/prepare.js <slug> <scratchpad-dir>` first: it copies the MP4 into the session scratchpad under the video title (the file name becomes the initial title in Studio), extracts the title-card thumbnail (1280x720 JPEG, taken inside the opening card) next to it and into the lesson folder, and prints the chapter candidates (each narration line's start as m:ss). Chrome's `file_upload` only accepts files inside the scratchpad and under 10,000,000 bytes; when the master is larger, prepare.js writes a 1080p HEVC two-pass copy that fits instead (H.264 at that bitrate smears terminal text). YouTube gets the smaller copy; the master stays in the lesson folder. - thumbnail: always the video's own opening title card (the beige text screen), never an app screenshot or YouTube's auto-pick; prepare.js extracts it and it is uploaded in the Thumbnail step. - title: the lesson title from `lesson.json`, nothing appended (no "(Mac Tutorial)"), brand is lowercase `lpm`, 100 characters max. - description: a two-line keyword hook (what the video shows, for whom), one line on what lpm is (starts, stops, duplicates and switches between local dev projects on a Mac, with a built-in terminal for AI coding agents such as Claude Code and Codex), the link `https://lpm.cx` (never the demo link `lpm.cx/demo`, user rule 2026-09-19), "What you'll learn" bullets, "Chapters" (first at 0:00, at least three, each 10 s or longer, from prepare.js), on...