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The viral video score

Will your video go viral? Get a score before you post.

No one can predict virality with certainty — not Vidcoo, not anyone. Timing, audience mood, and plain luck all play a part no model can see. But the mechanics that kill videos are measurable before you post: a text hook that opens no loop, an opening frame nobody stops for, a payoff that lands fifteen seconds too late. Vidcoo measures those mechanics across every frame of your hook and every word of your script, then returns a 0–100 viral score with the exact fixes. You can't guarantee the win. You can stop losing on the things you control.

What the viral video score is

Upload one short: 60 seconds or less, MP4, MOV, or WebM, up to 250MB, one analysis at a time. Vidcoo reads your hook frame by frame and your script word by timestamped word, grades eight metrics, and hands back four things: a 0–100 score, a plain verdict, evidence frames pulled from your own video, and a prioritized fix list with exact rewrites. It's the test the feed runs on your video — run before the feed gets to.

The 8 metrics, in plain language

  • 01

    Text hook

    The words on screen in your opening seconds. Do they open a loop the viewer has to close — or summarize the video and kill the reason to watch it?

  • 02

    Visual hook

    What the first frames actually show: motion, a face, a pattern break. A static shot of you on a plain wall gives a scrolling thumb nothing to stop for.

  • 03

    Spoken hook

    Your first sentence, judged word by word from the transcript. “Hey guys, welcome back” loses viewers before your point ever arrives.

  • 04

    Hook alignment

    Whether text, visuals, and voice pull in one direction. If the caption promises a secret and the audio opens with housekeeping, viewers feel the bait and leave.

  • 05

    Curiosity & contrast

    Whether the open builds enough tension to hold someone who has a thousand other videos one swipe away.

  • 06

    Speed to value

    How fast the promise pays off. The word timestamps show exactly how many seconds you spend clearing your throat.

  • 07

    Proof & authority

    Why anyone should believe you: shown results, specifics, a demonstration — instead of claims.

  • 08

    Composition

    Framing, caption placement, and readability at arm’s length — on the phone where your video actually gets judged.

What the score means

The score runs 0 to 100, weighted toward your opening seconds — the moment most viewers decide to stay or scroll. Read it qualitatively. High means the mechanics are working: post it. Mid means the idea survives, but named fixes will recover viewers you're currently losing. Low almost always means the open failed, so reshoot the first three seconds, not the whole video. The exact weights behind the eight metrics stay internal, because creators who know which metric counts double start chasing that metric instead of the viewer.

Evidence frames: the receipts

You don't take the score on faith. The report pins still frames from your own video to each call it makes — the exact frame where the visual hook goes static, the caption that's unreadable at arm's length. You see what the viewer saw at the moment they left.

The fix list

A score by itself doesn't tell you what to reshoot. Every report ends with a prioritized fix list — the change that recovers the most viewers comes first. And the rewrites are exact: not “improve your hook,” but the replacement line itself, ready to record.

How we calibrated it — honestly

We built the rubric on 40 real shorts: 20 that blew up and 20 that stalled under 2,000 views, scored blind, without knowing which group each video came from. That makes this calibration, not prophecy. It means the rubric reflects what actually separated winners from dead-on-arrival videos in the real feed. It does not mean a high score is a guarantee: a clean video posted to the wrong audience at the wrong hour can still stall. What the score removes is the other failure mode — a good idea dying on a fixable mechanical mistake.

One score, every platform

The score works on any vertical short, because retention mechanics travel. The platforms differ in how they surface what retains — that's covered in the TikTok video analyzer, Instagram Reels analyzer, and YouTube Shorts analyzer pages. For the theory underneath all eight metrics, read why videos go viral. And if you just want to run the test, Vidcoo has one job: test your video before you go live.

First analysis free. No credit card. Plans from $19/month for 30 analyses. Videos deleted within 24 hours; reports stay in your account.

Score my video free

Frequently asked questions

Can AI predict if a video will go viral?

Not with certainty — virality also depends on timing, audience, and luck that no model can see. What AI can measure is the mechanics that decide whether viewers stay: your text, visual, and spoken hooks, your speed to value, your proof. Vidcoo scores those mechanics before you post, so the part of virality you control is handled before the feed sees your video.

What makes a video go viral?

The short answer is retention; the full breakdown of how the feed decides is on our why videos go viral page.

What is a good viral score?

Read it qualitatively. A high score means the measurable mechanics are working and the video is worth posting as-is. A mid score means the idea survives but specific fixes will recover viewers. A low score almost always means the opening seconds need a reshoot — rarely the whole video. The verdict on your report says which camp you're in, in one line.

How is the score calculated?

Eight metrics, each graded from your video's own frames and transcript, weighted into one 0–100 number. The hooks carry the most weight, because the opening seconds are where most viewers decide to stay or leave.