video/skills/creative/storytelling.md

Storytelling & Narrative Structure for Explainer Videos

Sources: YouTube Creator Academy, Derek Muller PhD thesis (U. Sydney 2008), Kurzgesagt production methodology (Philipp Dettmer), 3Blue1Brown (Grant Sanderson), Richard Mayer "Multimedia Learning" (Cambridge UP, 2001/2020)

The Explainer Arc Template

For a 3-minute explainer video (scale proportionally for other lengths):

[0:00 - 0:08]  HOOK
               Pattern interrupt or counterintuitive claim. 1-2 sentences max.
               Visual: striking image or animation that creates curiosity.

[0:08 - 0:30]  TENSION / INFORMATION GAP
               "Here's what most people think... but that's not quite right."
               Establish stakes: why should I care?
               Visual: show the misconception or the puzzle.

[0:30 - 0:50]  CONCEPT 1 (Foundation)
               Simplest building block needed. ONE idea, ONE visual.
               End with a "but" or "therefore" transition.

[0:50 - 1:15]  CONCEPT 2 (Complication)
               Build on Concept 1. Introduce the wrinkle.
               Visual: transform/evolve the previous visual.

[1:15 - 1:20]  PALETTE CLEANSER
               Brief pause, visual gag, or "let that sink in" moment.
               Gives working memory a beat to consolidate.

[1:20 - 1:50]  CONCEPT 3 (Key Insight)
               The "aha" moment. Core of the video.
               1-3 seconds of deliberate silence after the reveal.
               Visual: the most polished animation in the video.

[1:50 - 2:20]  PROOF / EXAMPLE
               Concrete demonstration: "Watch what happens when..."
               Visual: show the insight working in a specific case.

[2:20 - 2:45]  IMPLICATIONS / "SO WHAT?"
               Connect back to the real world. "This means that..."
               Scale from specific back to general.

[2:45 - 3:00]  REFRAME + CLOSE
               Callback to the hook. Restate the core insight in one sentence.
               Optional: open a new curiosity gap.

Scaling by Duration

Length	Concepts	Hook	Tension	Core	Proof	Close
1 min	1-2	5s	10s	30s	10s	5s
2 min	2-3	8s	15s	60s	25s	12s
3 min	3-5	8s	22s	100s	30s	15s
5 min	5-8	10s	30s	180s	50s	20s

Anti-Subjective Rule

Hooks, beats, and section descriptions in OpenMontage scripts must describe the visual cause of the emotion, not the emotion itself. The CMU/Harvard CHAI study showed that subjective phrasing varies wildly across annotators and across model interpretations — so it does not constrain pixels and it doesn't reliably guide downstream generation tools.

Avoid	Use instead
"epic reveal"	"wide aerial pull-back; subject silhouetted against rising sun"
"inspiring moment"	"low angle on the subject's face; light catches the edge of a tear"
"moody atmosphere"	"low-key key light, lifted shadows by 2 stops, fog volumetrics"
"powerful music swell"	"music drops out at 0:42, holds 1.5s of silence, returns with low taiko at half tempo"

The rule applies to script narration AND to the metadata fields scene-director consumes. For the universal vocabulary that names these visual primitives, see skills/creative/video-gen-prompting.md.

Subject Transitions in the Script

When a script beat introduces a new subject, kills one off, or hands focus from one subject to another, name the transition explicitly so the scene-director doesn't have to infer it. The CMU/Harvard taxonomy uses four labels:

Label	What it means
revealing	A new subject enters frame or is uncovered (door opens, camera pans to find them, fog clears).
disappearing	An existing subject leaves frame or is removed (walks out, fades, eclipsed).
switching	Focus jumps from subject A to subject B (cut, rack focus, camera whip).
complex-alternating	Multiple subjects trade focus repeatedly within a beat (debate cross-cutting, ensemble action).

Add 1-2 sentences in the beat describing the mechanism (cut, pan, reveal-by-light, etc.). This propagates into the scene_plan as a transition primitive.

Hook Types

Type	Pattern	Best For
Contrarian	"Everything you've been told about X is wrong."	Veritasium-style science/myth-busting
Outcome	"By the end of this video, you'll understand X."	3Blue1Brown-style math/concept
Mystery	"In 1987, something impossible happened..."	Kurzgesagt-style story-driven
Stakes	"This one mistake costs people X every year."	Practical/how-to content

The 30-Second Rule

YouTube data shows 50% of viewer drop-off happens in the first 30 seconds. The hook + tension setup MUST be complete by second 30. Retention curves that survive the 30-second cliff typically retain 40-60% through the full video.

The "But-Therefore" Method

Never connect sections with "and then." Always use "but" or "therefore."

Bad: "Atoms have electrons, AND THEN those electrons have energy levels, AND THEN..."

Good: "Atoms have electrons, BUT they don't behave like tiny planets, THEREFORE we need a completely new model..."

Applied structure:

SETUP:     Here's what you think you know about X.
BUT:       Here's why that's wrong / incomplete / surprising.
THEREFORE: We need to understand Y (the real mechanism).
BUT:       Y creates a new puzzle...
THEREFORE: The actual answer is Z.
THEREFORE: This changes how you should think about X.

Misconception-First Approach (Research-Backed)

Derek Muller's PhD research (University of Sydney, 2008) showed that videos presenting common misconceptions FIRST, then refuting them, produce significantly higher learning gains than videos that simply present correct information. Viewers who watched "misconception-first" videos scored higher on post-tests and reported higher engagement.

Apply this: always consider opening with what the audience thinks is true before revealing what actually is.

Guided Discovery (3Blue1Brown Method)

Don't explain the answer. Reconstruct the reasoning path so the viewer feels they discovered it.

1. The Question — Pose a specific, concrete question
2. The Naive Attempt — Show the obvious approach; let it partially work, then break
3. The Key Insight — Introduce ONE new idea. Pause visually for 2-3 seconds of silence.
4. The Build — Apply the insight step by step. Each step feels inevitable.
5. The Generalization — "Notice this pattern works beyond our specific example..."

Progressive Revelation: Never show the full picture at once. Build visuals layer by layer. Each layer arrives exactly when the narration references it.

Camera Intent Per Beat

When writing a beat, attach one line of camera intent so the scene-director doesn't have to invent it from a blank slate. Use the universal vocabulary in skills/creative/video-gen-prompting.md (Subject / Subject Motion / Scene / Spatial Framing / Camera). One line is enough — the scene-director will expand it.

Example beat:

[0:30] Concept 1 — atoms aren't tiny planets
Narration: "We grew up imagining electrons as tiny planets orbiting the nucleus..."
Camera intent: medium shot of stylized atom; slow rotation; deep focus.

The camera-intent line is consumed verbatim by the scene-director's 5-aspect spec — keep it concrete, no mood adjectives.

Pacing Rules

Rule	Value	Source
Narration speed	150-160 wpm	Kurzgesagt standard (conversational is 170-190)
New visual element	Every 3-5 seconds	Kurzgesagt production rules
Concept density	Max 1 new concept per 30-45 seconds	Mayer's Segmenting Principle
Pattern interrupt	Every 45-90 seconds	YouTube retention data
Deliberate silence	1-3 seconds after key insights	3Blue1Brown technique
Palette cleanser	Every 45-60 seconds	Kurzgesagt production rules

Mayer's Multimedia Learning Principles (Applied)

These are the most relevant research-backed rules from cognitive science:

1. Segmenting — Max 1 new concept per 30-45 seconds. A 3-min video = 4-6 concept segments.
2. Signaling — Use verbal signposts every 30-45 seconds ("Here's where it gets interesting").
3. Temporal Contiguity — Narration and visuals must be simultaneous. Learning drops ~30% when offset even by a few seconds.
4. Coherence — Remove interesting-but-irrelevant content. "Seductive details" reduce learning by 20-30% on transfer tests.
5. Modality — Use narration (audio) + visuals (animation), NOT on-screen text + visuals. Spoken words + pictures outperform written words + pictures.

Applying to OpenMontage

When writing a script artifact for the animated-explainer pipeline:

1. Choose a hook type from the table above based on the topic
2. Structure sections using the Explainer Arc template
3. Apply "but-therefore" connectors between sections
4. Consider the misconception-first approach for science/technical topics
5. Set narration_wpm: 155 in the script to calculate accurate timing
6. Plan visual changes every 3-5 seconds in the scene_plan
7. Mark "silence" beats in the script for key insights
8. Validate: total concepts should not exceed the scaling table above