Reels-ready · 9:16 · 32 seconds
Cinematic Giveaway Reveal Video — 32-Second 3D Winner Announcement
Auto-generated 32-second 3D reveal video, Reels-ready 9:16. The winner's @username is locked to a SHA-256 hash anyone can re-verify — so the wow-factor cut and the fair-draw proof ship in the same MP4.
Winner
@maya.creates
1 of 12,847 entries
SHA-256 proof
9f3a·b71c·4e08·d2af…verify
Frame 24/32 — winner card with @username + SHA-256 proof badge.
Why a 9:16 reveal beats a screenshot
Creators who run giveaways on Reels and Stories live and die by the first 3 seconds of the announcement. A static screenshot of a winner list scrolls past at the same speed as a meme. A 32-second 3D reveal — vertical, sound-on, animated logo, name-drop on the beat — holds the swipe long enough for the audience to actually register that you ran a fair draw and who won.
Rafflecopter renders the MP4 the moment the draw closes. No After Effects template, no "please tag me in the result" DMs, no manually typing the winner's @username into a Canva mockup. The video is ready to upload before you finish writing the caption.
What goes inside the 32 seconds
0:00 – 0:06 · Hook
Brand logo orbits a particle field. Your primary colour drives the lighting. Caption: "The draw is closed."
0:06 – 0:18 · Shuffle
A 3D wheel of @usernames spins, slows, and lands. The shuffle order is the actual Fisher–Yates output, not a fake loop.
0:18 – 0:26 · Winner card
The winner card pushes forward with the @username, avatar initial, total entry count, and a confetti burst.
0:26 – 0:32 · Proof badge
SHA-256 hash badge slides in with the public verification URL burned into the bottom safe area.
Why the SHA-256 hash matters on a reveal video
Any creator with five minutes and After Effects can fake a winner announcement video. That is the uncomfortable truth — the more cinematic the reveal, the more it looks like a paid promo. The SHA-256 hash burned into the last 6 seconds of the MP4 is what separates a Rafflecopter reveal from a Photoshop job.
The hash is the first 8 hex bytes of the seed used to pick the winner. Any audience member can open the Verifiable Giveaway Protocol page, paste the hash into /api/verify/{hash}, and re-run the exact same draw from the public comment list. If a different @username comes out, the video was tampered with. If the same @username comes out, the reveal is mathematically honest.
What counts as a fair draw, technically
A "fair" draw has three properties: it must be uniform (every entry has equal probability), it must be deterministic from public inputs (so it can be re-verified), and it must be tamper-evident (any post-hoc edit to the inputs must change the output).
- Uniformity is delivered by HMAC-DRBG with SHA-256, a NIST-approved CSPRNG (NIST SP 800-90A).
- Determinism comes from the canonical-JSON serialization of the input (post URL, sorted comments, ISO-8601 timestamp, winner count, exclusions).
- Tamper-evidence is the SHA-256 collision-resistance guarantee (NIST FIPS 180-4) — flip a single character in the comment list and the published hash no longer matches.
The 32-second reveal video does not replace the proof — it carries it. The MP4 is the wow-factor; the hash badge in the last frame is the receipt.
FAQ
How long is the cinematic giveaway reveal video?
Exactly 32 seconds — tuned to fit Instagram Reels, TikTok and YouTube Shorts without forcing your audience to tap "see more", while still leaving room for a 3D camera move, the winner card reveal, and the SHA-256 proof badge.
What aspect ratio is the video rendered in?
Native 9:16 vertical at 1080×1920, 30 fps, H.264 MP4. It is ready to upload to Reels, Stories or TikTok without any cropping or letterboxing.
What does the SHA-256 hash on the winner card mean?
It is a short prefix of the SHA-256 seed used to deterministically pick the winner. Anyone can re-run the draw at /api/verify/{hash} and confirm the exact same @username comes out — mathematically proving the reveal video was not faked.
Can I customise the brand colours and logo in the 3D reveal?
Yes — upload a logo and pick a primary colour from the draw screen. The 3D scene, the winner card frame and the proof badge re-render in your palette before the MP4 is encoded.
Is the cinematic reveal video included in the free plan?
Yes. Every draw on Rafflecopter — including the free tier — gets a downloadable 32-second cinematic reveal video plus a shareable public verification link.
Trusted by 38,000+ creators
Ship the wow-factor and the proof in one MP4
Every draw generates a 32-second 3D reveal video plus a public verification URL. No watermark on the free plan. No After Effects. No DMs asking the host to "show the screenshot."
- · NIST SP 800-90A CSPRNG
- · 1080×1920 H.264 MP4
- · CC-BY-4.0 open protocol