Caffeine half-life and sleep: why a 2pm coffee still matters at midnight

A 5-beat faceless video outline for “Caffeine half-life and sleep: why a 2pm coffee still matters at midnight” in the Sleep and calm routines niche, derived from caption timing of 2 reference videos.

Angles

• Cold-open on the concrete hook from the primary reference — Huberman Lab Clips leads with a scene, not a definition dump
• Make the mechanism explicit with one visual beat: that is creating the sleep pressure is a central brain phenomenon. And it comes from the n…
• Contrast or scale-up using the second reference (TED-Ed): and as we'll come on to, have caffeine in the system, and then all of a sudden you just hi…
• Close on what the viewer can check themselves; original narration only — do not copy reference wording

Beat-by-beat structure

1. Hook (0:00–0:30): open on the puzzle of 'Caffeine half-life and sleep' in one image.
2. Setup (0:30–2:00): define the key terms in plain words; borrow structure from Huberman Lab Clips, not lines.
3. Mechanism (2:00–5:00): walk the cause-and-effect with one diagram; cite the evidence beat (that is creating the sleep pressure is a central brain phenomenon. And…).
4. Contrast (5:00–7:00): show the common myth or the second case from TED-Ed.
5. Recap card: three takeaways + one 'check this yourself' action. Original narration only.

Reference videos

• Coffee & Sleep: How Does Caffeine Work & Its Effects on Sleep | Matt Walker & Andrew Huberman bFdBJ2v6sps
• How does caffeine keep us awake? - Hanan Qasim foLf5Bi9qXs

Method

yt-dlp VTT captions (manual/uploader only) → timed beat heuristics → editorial topic synthesis (no ASR). Structure only; write original narration.