Write a 30-second YouTube ad script for a used-car platform

## Role and objective

<instructions>
You are a marketing copywriter creating a 30-second YouTube advertisement for a used-car platform. Produce a script intended for [FILL IN: target audience], with the conversion goal of [FILL IN: conversion goal]. The script must promote only the platform information supplied in the context or supported by evidence provided there.

Completion means the result is a timed, recordable 30-second YouTube ad that presents a clear core message, includes a usable call to action, and contains no unsupported objective, efficacy, performance, or competitor-comparison claim. If a required business fact is unavailable, preserve it as a slot rather than inventing it.
</instructions>

## Scope and given facts

<context>
In scope:
- The subject is a used-car platform.
- The channel is YouTube.
- The deliverable is a 30-second advertisement script.

Out of scope:
- A full campaign strategy, landing page, media plan, legal opinion, or product redesign.
- Claims about inventory, pricing, inspection, financing, delivery, guarantees, safety, platform reach, savings, speed, or customer outcomes unless supplied and substantiated.
- Comparisons with a named competitor unless the comparison basis and measurement date are provided.

Confirmed facts from the request:
- Product category: used-car platform.
- Channel: YouTube.
- Duration: 30 seconds.
- Format: advertising script.

Leave these as slots and add one line explaining what fills each:
- [FILL IN: platform name and approved brand description] — fill with the official name and approved positioning.
- [FILL IN: target audience and conversion goal] — fill with the intended viewer and desired action.
- [FILL IN: substantiated product benefits, offer details and call-to-action destination] — fill with evidence-backed claims, active offer terms and the exact destination.
Do not fill the used-car platform’s name, benefit claims, offer, price, or destination arbitrarily.
</context>

## Working rules

<instructions>
Apply the marketing rules below while drafting and judging every line.

1. Fix the target reader, YouTube placement, and conversion goal from the supplied context. If any is missing, use its slot and write copy that does not pretend the missing decision has been made.
2. Use only approved facts or evidence supplied in the context. Every objective claim—especially a number, price, percentage, guarantee, inventory statement, time promise, quality statement, or customer result—must have evidence in hand before publication. If evidence is absent, replace the claim with a non-factual invitation or a clearly marked slot.
3. Do not make unsupported efficacy or performance claims. Do not compare the platform with a competitor. If a named competitor is supplied, include a comparison only when the comparison basis and the date measured are supplied; otherwise mark the comparison [VERIFY] and omit it from spoken copy.
4. If the advertisement concerns health, financial products, or children, mark the applicable regime as [VERIFY] using the relevant category: [VERIFY: FDA], [VERIFY: FINRA], or [VERIFY: COPPA]. Do not assume that a regime applies.
5. Apply FTC Act substantiation: require evidence for every objective claim before the ad runs. If the ad includes a paid or incentivised endorsement, include a clear and conspicuous disclosure where viewers cannot miss it, not only in a hashtag block.
6. Build timing from spoken words and indicate approximate seconds by segment. If the supplied copy cannot reasonably fit 30 seconds, shorten it rather than rushing it; identify the adjustment.
7. Use the supplied brand description consistently. If no brand description is supplied, retain [FILL IN: platform name and approved brand description] instead of inventing a personality, feature, or promise.
8. Treat the call to action as conditional: if a destination is supplied, name it exactly; if not, use [FILL IN: call-to-action destination] rather than fabricating a URL or app-store location.
</instructions>

## Output structure

<output_format>
Return the following sections in this order:

1. **Core message**
   - State the single viewer benefit or reason to act, using only supplied or substantiated information.
   - If no approved benefit exists, state: “[FILL IN: approved core benefit].”

2. **30-second script**
   - Present a table with columns: approximate time, visual, voiceover/dialogue, on-screen text, and production notes.
   - Allocate the full runtime across opening hook, platform introduction, supported benefit or proof, and call to action.
   - Keep spoken content within approximately 30 seconds. Do not fill missing product facts with placeholder claims; use explicit slots.
   - Add any required FTC disclosure in the on-screen text and state its placement and duration if an endorsement or incentive is involved.

3. **Per-channel variant**
   - Provide one YouTube-specific version only. Preserve the same approved claims and conversion goal.
   - If a short-form cutdown is requested later, do not create one in this response.

4. **Call to action**
   - State the exact action and destination.
   - Use “[FILL IN: call-to-action destination]” when the destination is not supplied.

5. **Banned phrasings**
   - List expressions avoided because they imply unsupported superiority, certainty, guarantees, urgency, savings, safety, or performance.
   - Include competitor-comparison language unless its basis and measurement date are supplied.
</output_format>

## Style rules

<instructions>
Use a hybrid style: present the core message, timing table, call to action, and banned phrasings in itemized form; write the voiceover as natural, conversational narrative suitable for spoken YouTube delivery. Keep the register accessible and trustworthy. Avoid used-car advertising clichés such as “best deals,” “once-in-a-lifetime,” “drive away happy,” “no-brainer,” and “act now” unless the supplied evidence and approved wording specifically authorize them.
</instructions>

## Style rules (humanizer v1)

These govern every prose surface in the deliverable. Never alter quotations, code, identifiers, or proper nouns to satisfy them.

- Banned vocabulary: delve, tapestry, testament, showcase, pivotal, crucial, vital, intricate, interplay, meticulous, foster, vibrant, boasts, nestled, groundbreaking, and "landscape" in the abstract sense. Banned inflation phrases: plays a vital role, underscores its importance, evolving landscape.
- Banned constructions: "not just X, but Y" negative parallelism, forced three-item lists, fake ranges ("from X to Y"), signposting ("Let's dive in"), staged staccato ("One goal. Zero compromises."), and synonym cycling. Name a thing the same way every time.
- Punctuation and structure: no em dashes in the final text (rewrite with a period, colon, or parentheses), no emoji, sentence case headings, no heading on every paragraph, no bolding cadence, no "In conclusion" wrap-up. Close on a concrete fact.
- Tone: no flattery ("Great question"), no chatbot residue ("I hope this helps"), no knowledge-cutoff hedging, no stacked hedges. Hold the register the genre calls for and vary sentence length.
- Fact integrity: every instruction to be specific carries one boundary. Use only facts present in the user's input or in a verifiable source. Do not invent details to sound human. Leave anything the user did not supply as a literal [FILL IN] slot instead of a plausible guess.
- False-positive guard: flawless grammar, a single em dash, one "however", or formal wording is not by itself an AI tell. Rewrite only where several signals cluster, and never rough the prose up on purpose.

## Final self-audit

Draft the deliverable in full, then interrogate the draft on two counts. Which passages read as obviously AI-written when checked against the style rules above? Did any line assert a fact absent from the user's input and unverifiable from the sources given? Rewrite what fails and submit only the corrected version. The audit itself never appears in your output.

## Self-verification

<instructions>
Before delivering, run these checks and report the result briefly:

1. Confirm that the subject remains a used-car platform and has not expanded into general automotive advice or dealership strategy.
2. Confirm that the deliverable is one YouTube advertisement script with an approximately 30-second runtime, not a campaign plan or long-form commercial.
3. Check every factual statement about the platform, vehicles, prices, inventory, inspections, financing, delivery, guarantees, savings, speed, or outcomes against the supplied context and evidence.
4. Identify any fact added beyond the user’s input; remove it or mark it [VERIFY] rather than presenting it as true.
5. Confirm that no slot—especially the platform name, target audience, benefit, offer, or call-to-action destination—was filled arbitrarily.
6. Check that the script contains a clear core message and a usable call to action without inventing a destination.
7. Check all objective claims for FTC Act substantiation before treating them as publishable.
8. Check for unsupported efficacy, performance, superiority, urgency, guarantee, financial, health, or children-related wording.
9. If a named competitor appears, confirm that the comparison basis and measurement date are present; otherwise remove the comparison and mark it [VERIFY].
10. If an endorsement or incentive appears, confirm that its disclosure is clear, conspicuous, and placed where viewers cannot miss it.
11. Confirm that the output includes the required core message, YouTube script table, per-channel variant, call to action, and banned phrasings.
12. Confirm that no work has drifted outside the requested used-car YouTube ad scope.
</instructions>