docs: add Video Editor Cheatsheet guide

[miguel-heygen]

Problem

Non-technical video editors and creative people working with HyperFrames had no single fast reference. The existing docs assume a developer audience — the concepts, CLI, and prompting guides are thorough but not shaped for someone who just wants to know which key scrubs the timeline, which command renders a draft, or how to hand off a manual Studio tweak to an agent.

What this adds

• Adds docs/guides/video-editor-cheatsheet.mdx — a fast reference shaped for video editors and creatives directing agents.
• Covers: the fast loop, terminal shortcuts, Studio keyboard shortcuts, CLI commands editors use most, timing attributes as timeline controls, render presets, publish and share, agent-browser verification flow, and a quick-fixes table.
• Registers the page in the Guides navigation group in docs/docs.json, between Timeline Editing and Common Mistakes.

Verification

Local checks

• git diff --check → clean
• Lefthook pre-commit → lint, format, and typecheck skipped (no inspectable staged files); commitlint passed

Browser verification

• Started mintlify dev --no-open --port 3001 from docs/ on Node 22.
• Used agent-browser to open http://localhost:3001/guides/video-editor-cheatsheet.
• Verified page title, description, and all section headings rendered correctly.
• Verified "Video Editor Cheatsheet" appears in the Guides sidebar between Timeline Editing and Common Mistakes.
• Verified right-side ToC lists all sections: The Fast Loop, Terminal Shortcuts, Preview Shortcuts, Agent-Led Editing, Manual DOM Editing, CLI Commands Editors Use Most, Timing Cheatsheet, Render Presets, Publish and Share, What Agent Browser Is, Quick Fixes.
• Verified code blocks, tables, <Tip>, and <Warning> callouts render correctly.
• Screenshots kept local, not committed.

Notes

• Source content adapted from the internal HyperFrames Video Editor Cheatsheet (Notion) — angle-bracket artifacts in code examples fixed, render-preset sections collapsed into a single table.

[mintlify]

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Project	Status	Preview	Updated (UTC)
hyperframes	🟢 Ready	View Preview	Apr 28, 2026, 12:56 AM

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