hoodini/ai-agents-skills

Video → Scroll-Driven Landing Page

Build a cinematic landing page where the hero is a video playing on scroll instead of time — like Apple product pages or the GitHub Copilot landing. Frames are extracted from the source video and swapped as the user scrolls; below the sticky hero, normal-scroll sections carry copy and CTA.

When to invoke

• User drops a video and asks for a landing page, scrolling site, scroll-frame hero, or website from a video
• Mentions of "Apple-style scroll", "GitHub Copilot landing", "scrub-on-scroll", "frame on scroll"
• Hebrew equivalents: "דף נחיתה מסרטון", "אתר עם גלילה", "סרטון בגלילה"

Save location

Default: ~/Documents/yuv-projects/landings/<slug>/ — always save landing pages here so you can find them again. Create the parent directory if missing.

mkdir -p ~/Documents/yuv-projects/landings
cd ~/Documents/yuv-projects/landings
# Build <slug>/ here.

Final path: ~/Documents/yuv-projects/landings/<slug>/. Tell the user where the landing lives at the end of every build.

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Workflow (8 steps)

1. Probe the source — ffprobe for duration, fps, dimensions, audio.
2. Pick frame count — default 80. Floor 40 (choppy if lower), ceiling 160 (heavy page). Choose by duration: ≤10s → 50, 10–30s → 80, 30–60s → 120, >60s → 160.
3. Decide output directory — default ~/Documents/yuv-projects/landings/<slug>/. The <slug> is short, derived from the video name or the topic. Override only on explicit request.
4. Extract frames — run references/extract-frames.py <source-video> <output-dir> [count]. Outputs output-dir/frames/f_0001.jpg… with consistent JPG quality 82 and a max-width of 1920 (downscaled if source is larger).
5. Copy and customise references/landing-template.html into output-dir/index.html:
   • Replace the __FRAMES__ placeholder with <img> tags for each frame (the build script does this for you when you pass --build-html).
   • Fill in __HEADLINE__, __TAGLINE__, __CTA_TEXT__, __CTA_HREF__, sections.
   • For Hebrew content: set <html lang="he" dir="rtl"> and swap fonts to Rubik/Assistant (see references/design-notes.md).
6. Optimise frames — the build script already scales to 1920px max-width. If the page total weight is > 12 MB, drop quality to 75 or reduce frame count.
7. Preview — python -m http.server inside the output directory and open http://localhost:8000. Scroll feels buttery on a decent machine.
8. Deploy — drop the folder on Vercel/Netlify/Cloudflare Pages. No build step needed.

The scroll mechanic

• Outer scroller .scroll-stage height set in viewport units (default 600vh = scroll 5 screens to traverse all frames).
• Sticky hero position: sticky; top: 0; height: 100vh containing all frames absolutely positioned and hidden except the active one.
• Scroll listener computes progress = scrolledIntoStage / scrollableHeight clamped 0–1.
• idx = floor(progress * (N - 1)) — swap the .active class to that frame.
• Wrap the listener in requestAnimationFrame to keep 60fps.

Design rules

• If the project is YUV.AI-branded (Yuval personally, his portfolio, his brand): call yuv-design-system and lock it to a mode by medium —
  • Neon mode (DEFAULT for YUV.AI web): hot pink (#FF1464) + neon cyan (#00E5FF) + white or rich black canvas. Anton + Inter (English) / Rubik + Assistant (Hebrew). 0px or 999px radii.
  • Warm Editorial mode: only for Hope, Marcus, bigcats.ai, practical.yuv.ai — pink + yellow + bone, off-white never pure #fff.
  • Never use Decks mode (Fly High purple/yellow) for a landing page — that palette is reserved for slide decks only.
• If the project is not YUV.AI-branded: do not apply yuv-design-system. Pick a palette that fits the source video's mood. Anton + Inter remain reasonable defaults but aren't mandatory.
• Hero overlays should be subtle — a vignette and a single big headline; don't drown the frame.
• Below-hero sections: light canvas (white in Neon mode, off-white in Warm Editorial, bone if going generic-warm), large Anton heading, body copy in Inter at 18–22px, CTA as a sharp pill (border-radius: 999px) — pink fill in Neon mode, brand-appropriate color otherwise.
• For Hebrew: respect RTL, use Rubik 900 for headlines, Assistant 400/500 for body.

File references

File	Purpose
references/extract-frames.py	ffmpeg-based frame extractor; optionally builds the full HTML in one go
references/landing-template.html	Self-contained landing-page skeleton with the scroll mechanic
references/design-notes.md	Typography, palette, and motion defaults