Science Fact of the Day
A 24-second 9:16 (1080×1920) faceless-content short that delivers one surprising fact and is built to loop: a full-bleed hook question, the fact stated at 104px on a tighter crop of the same photograph, a white break card holding the big number, a payoff over a second image, and a channel sign-off that cross-dissolves back toward the opening frame. Deep-space navy carries four scenes, a single white card breaks the run at the midpoint, and electric cyan is the only other colour — used for the top-edge progress rail that fills 16→40→62→84→100% so the viewer always sees how much short is left. Eighteen fields swap per render: nine text (hook_question, fact_headline, stat_value, stat_unit, payoff_line, source_label, fact_number, channel_name) plus the eight caption halves (caption_1/2/4/5_lead in white and caption_1/2/4/5_accent in cyan, which together form the narration line burned onto each footage frame), and two images (image_1, reused at three different focal crops, and image_2). Paste thirty rows of facts into a spreadsheet and get thirty finished daily uploads back without opening an editor.
- Aspect ratio
- 9:16 · Vertical
- Duration
- ~24s
- Category
- Educational
Try it with your own copy
Edit a field and the frame re-renders in your browser. No account, no credits - previews are free because they cost a browser paint, not a render.
What you can customize
This template exposes 18 dynamic fields you can swap per video - edit them in the editor or pass them to the API to batch-render variations at scale. The monospace name is the exact key to send in replacements.
Image 1
urlimage_1https://images.unsplash.com/photo-1584303360724-eb0958f62ee0?fm=jpg&q=85&w=1600&auto=format
Channel Name
textchannel_nameStrange But True
~50 characters max · 1 line
Hook Question
texthook_questionWhich came first: sharks or trees?
~40 characters max · 2 lines
Caption 1 Lead
textcaption_1_leadYou have this
~18 characters max · 1 line
Caption 1 Accent
textcaption_1_accentbackwards.
~16 characters max · 1 line
Fact Headline
textfact_headlineSharks are older than trees.
~40 characters max · 2 lines
Caption 2 Lead
textcaption_2_leadWood is the
~35 characters max · 1 line
Caption 2 Accent
textcaption_2_accentnewer invention.
~35 characters max · 1 line
Stat Value
textstat_value450M
~8 characters max · 1 line
Stat Unit
textstat_unityears of sharks. The first tree grew 60 million years later.
~71 characters max · 2 lines
Source Label
textsource_labelFossil record · Devonian
~60 characters max · 1 line
Image 2
urlimage_2https://images.unsplash.com/photo-1749324228732-5c35848efc8a?fm=jpg&q=85&w=1400&auto=format
Payoff Line
textpayoff_lineEvery forest is younger than a shark.
~61 characters max · 3 lines
Caption 4 Lead
textcaption_4_leadNot a single forest
~35 characters max · 1 line
Caption 4 Accent
textcaption_4_accentis older.
~35 characters max · 1 line
Caption 5 Lead
textcaption_5_leadOne more
~17 characters max · 1 line
Caption 5 Accent
textcaption_5_accenttomorrow.
~18 characters max · 1 line
Fact Number
textfact_number047
~8 characters max · 1 line
Render it from the API
Copy either call below. Both already carry this template's ID and its real variable keys - swap the values for your own.
1. Preview it — free
Same body as a render. Costs no credits, creates no job. Returns a public URL that plays the video in a browser, plus a list of problems with your payload — a mistyped key is otherwise ignored in silence.
curl -X POST https://renderly.video/api/v1/previews \
-H "Authorization: Bearer $RENDERLY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"templateId": "science-fact-of-the-day",
"replacements": {
"image_1": "https://images.unsplash.com/photo-1584303360724-eb0958f62ee0?fm=jpg&q=85&w=1600&auto=format",
"channel_name": "Strange But True",
"hook_question": "Which came first:\nsharks or trees?",
"caption_1_lead": "You have this",
"caption_1_accent": " backwards.",
"fact_headline": "Sharks are older\nthan trees."
}
}'2. Render it
Change one word in the URL. Keep templateId — it is what links your call to this template, so later improvements reach you automatically.
curl -X POST https://renderly.video/api/v1/renders \
-H "Authorization: Bearer $RENDERLY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"templateId": "science-fact-of-the-day",
"replacements": {
"image_1": "https://images.unsplash.com/photo-1584303360724-eb0958f62ee0?fm=jpg&q=85&w=1600&auto=format",
"channel_name": "Strange But True",
"hook_question": "Which came first:\nsharks or trees?",
"caption_1_lead": "You have this",
"caption_1_accent": " backwards.",
"fact_headline": "Sharks are older\nthan trees."
}
}'The body above shows 6 of 18 variables. Send any subset — every key you leave out renders its authored default. Read the full contract, with character limits, from GET /api/v1/templates/science-fact-of-the-day/variables. See the previewing guide, the rendering guide, or the OpenAPI spec.
Frequently asked questions
How do I customize the Science Fact of the Day template?
Open the template in the Renderly editor and replace its 18 customizable fields (such as Image 1) with your own text, images, or video. Every change previews instantly before you render.
How much does it cost to render this template?
Rendering is credit-based - 1 credit equals 1 minute of 1080p video. You only pay when you export, and credits never expire on the pay-as-you-go plan.
Can I generate this video at scale via the API?
Yes. POST this template's ID and a replacements object to /api/v1/renders - one call per row of data, 18 fields swappable per video. Send the same body to /api/v1/previews first to check it for free. No-code integrations like Zapier work the same way.
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