---
number: "011"
slug: "011"
title: "From launch spec to launch video, without booking a studio"
summary: "Write the launch once in a Notion spec, hand the PDF to Synthesia's new Syren agent for a 60–90 second explainer with motion graphics and voiceover, then queue the cut-downs in Buffer as drafts."
chain: ["Notion", "Synthesia", "Buffer"]
for: "Product marketers, founders and solo makers who ship features every few weeks and announce them with a screenshot and a shrug"
time_to_set_up: "About 90 minutes for the first video (estimate), about 45 minutes after that"
cost: "From $0 to start (Notion Free, Synthesia Basic with launch credits, Buffer Free); Synthesia Starter $29/mo ($18 annual) for regular use"
last_verified: "Oct 2026 (desk-checked, not run end-to-end)"
date: "2026-10-14"
---

# From launch spec to launch video, without booking a studio

**Chain:** Notion → Synthesia → Buffer

## Why now

- **Synthesia launched Syren** (beta, Oct 9, 2026). You describe a video or hand it a document, and its agent builds motion graphics, avatar, voiceover, music and b-roll. You refine it in chat, and the result runs up to 3 minutes, horizontal or vertical. It's open to free and self-serve accounts, with launch credits for a first video. ([Synthesia](https://www.synthesia.io/post/syren-studio))
- **Synthesia's plans changed on Oct 1.** Every plan, including free Basic, now includes 10 minutes of video and 500 credits a month, and Creator was renamed Pro. ([Help center](https://help.synthesia.io/en/articles/17217419-what-s-changing-in-synthesia-plans-on-october-1-2026))
- **Buffer's AI Assistant and scheduling** are on its free plan, and it publishes to LinkedIn, YouTube Shorts, TikTok, Threads and more. ([buffer.com/pricing](https://buffer.com/pricing))

## Who it's for

Teams that ship often and announce rarely. If your changelog is better than your marketing, this is for you.

## What you get

- A reusable **Notion launch spec** that doubles as the video brief.
- A **60–90 second horizontal explainer** and a **vertical cut** for social, built from the spec and your brand assets.
- **Drafts in Buffer** for each channel, with the video attached, waiting for your approval.

## You'll need

| Tool | Plan you need | Current price (Oct 2026) | Link |
|---|---|---|---|
| Notion | Free works | $0; Plus $10/member/mo | [notion.com/pricing](https://www.notion.com/pricing) |
| Synthesia (Syren) | Basic (free) to try with launch credits. Starter for regular use | $0; Starter $29/mo or $18/mo billed annually (1,750 credits/mo) | [synthesia.io/pricing](https://www.synthesia.io/pricing) |
| Buffer | Free works (3 channels) | $0; Essentials $6/channel/mo ($5 annual) | [buffer.com/pricing](https://buffer.com/pricing) |

## Setup

### 1. Make the spec template (Notion, 15 min)

Create a page template called `Launch spec` with exactly these headings:

```markdown
# <Feature name>
## One sentence
(What it does, for whom: "X lets Y do Z without W.")
## The problem, in the customer's words
(One real quote if you have it.)
## How it works
1. (Step, as the user experiences it)
2.
3.
## Proof
(A number you can stand behind, a customer name you have permission to use, or nothing.)
## Call to action
(Where to go, what to click.)
## Must not say
(Unreleased plans, competitor names, pricing not yet public.)
```

Add 3–6 screenshots or a short screen recording to the page. Syren uses images and video you give it.

### 2. Fill it in for this launch (Notion, 20 min)

Keep "How it works" to three steps. If you can't, the video will be too long. Export the page: **••• → Export → PDF**, with images included.

### 3. Generate the explainer (Synthesia Syren, 30 min)

In Synthesia, click **Syren** in the left navigation. Upload the PDF and your brand assets (logo, colors, a past video whose style you like), and prompt:

```text
Make a 75-second horizontal product launch explainer from this spec.
Structure: hook (the problem quote) → one-sentence promise → the three steps, each
shown with the matching screenshot → proof (only if the spec has it) → call to action.
Use our brand colors and logo. Upbeat but not hypey; no "revolutionary", no
"game-changer". Use an avatar only for the first and last 5 seconds.
Do not mention anything under "Must not say".
```

Watch the build, then refine in chat: `shorten step 2`, `the screenshot in step 3 is wrong, use image 4`, `slower voiceover`. When it's right, ask for a **vertical version** of the same video for social. Export both.

### 4. Write the posts and queue them (Buffer, 15 min)

In Buffer, create a post per channel and attach the right cut: horizontal for LinkedIn and YouTube, vertical for Shorts, TikTok and Threads. Use Buffer's **AI Assistant** with the spec's one-sentence line to draft channel-specific captions, then edit them. Save as drafts or add to the queue.

### 5. Archive the launch (Notion, 2 min)

Paste the video links and post links back into the spec page. Next launch, duplicate the template and start again.

## Time to set up

About 90 minutes for the first video (estimate, not timed), mostly the template and the Syren refinement loop. Later launches take about 45 minutes.

## Cost

- **To try it:** **$0**. Notion Free, Synthesia Basic with Syren launch credits plus the 10 included minutes, and Buffer Free.
- **Regular launches:** Synthesia Starter **$29/mo** ($18/mo billed annually), with 1,750 credits a month on top of the included minutes.
- **Credits per Syren video:** Synthesia doesn't publish a fixed price per Syren video. Third-party reporting puts a typical 2-minute video with two rounds of edits at roughly 1,000–2,000 credits ([SlopTV](https://sloptv.co/news/synthesia-syren-launch-credit-range-agency-video-claim)). Treat that as a rough guide, and watch the in-app credit count on your first one.

Prices are list prices as of Oct 14, 2026.

## Gotchas

- **Syren is a beta.** Expect rough edges and changing credit costs. It's built for fast, creative output; Synthesia recommends its classic editor for content that must be exact and repeatable.
- **Chat edits cost credits.** Get the spec right before generating, rather than fixing the story in chat.
- **Avatars need a disclosure policy.** Decide in advance whether you label AI presenters. Many audiences (and some platforms) expect it.
- **Screenshots must be real.** Syren can generate b-roll; don't let it generate fake UI. Give it your screenshots and tell it to use only those for product shots.
- **Basic plan features.** Some brand features and export options vary by plan. Check what your plan includes before promising a client a branded export.

## Remix

- **Changelog reel:** run it monthly over the month's top three changes, as one 90-second "what's new".
- **Docs video:** the same spec, with a "for existing users" brief, makes a help-center walkthrough.
- **From a call instead of a spec:** use the Granola notes of the launch-planning meeting as the source document.

## Freshness log

- **Oct 14, 2026:** First published. Desk-checked against Synthesia's Syren launch post, Oct 1 plan-change article and pricing page, Notion's pricing page and Buffer's pricing page.

---

*Last verified: Oct 2026 (desk-checked, not run end-to-end). We checked every step, setting and price against the vendors' current docs. We have not yet run this chain live. If a step doesn't match what you see, reply and tell us. It'll be fixed in the next refresh.*