COACHING REPORT · REAL EXAMPLE

This carpet looks like it has a hole

Vertical Short ZACH KING · 9.5M VIEWS · AUTO-DETECTED 100%
DURATION 0:10RESOLUTION 2160×3840FPS 30VIDEO AV1AUDIO OpusCUTS 0

A ten-second, single-take illusion: a carpet that, from exactly one angle, looks like it has a hole in it. The craft is real — pin-sharp native 4K, clean exposure, a master that lands on the −14 LUFS target. But judged as a Short, one 10.4-second handheld take reads as weak rhythm and heavy shake, and that's where the 70 comes from. Here's the full read — what's deliberate, what's fixable, and the evidence for both.

Tap any timecode to see the moment

Zach King sits on a couch gesturing toward a black-and-white spiral illusion rug that appears to be a hole in the living-room floor, as a child enters from the left
OVERALL · 12 THEMES · WEIGHTED FOR SHORT
AT A GLANCE

Every theme, ranked by score.

Each theme is the average of its measures. The global score is then weighted by the detected genre — for a vertical short, instant readability, rhythm and audio carry more than chapter structure or end cards.

ThemeScore/100Verdict
BSharpness & Technical100Excellent
GVoice & Speech100Excellent
LAccessibility & Safety100Excellent
AExposure & Color94Excellent
DComposition & Framing92Excellent
KPlatform & Metadata91Excellent
FAudio Quality & Balance81Strong
EAudio Loudness72Good
JNarrative Structure50Weak
IOn-screen Text50Weak
CStability & Motion45Weak
HEditing & Rhythm22Weak
How to read this report Each measure is scored out of 100 against technical references (upload standards, EBU R128 loudness, WCAG legibility…) and subjective analysis (aesthetics, narrative). Measures are grouped into themes (theme = average of its measures); the global score is a weighted average based on the detected genre. Thresholds adapt to that genre too: a 10-second vertical short isn't judged like a 30-minute vlog — hooks, instant readability and a loop-friendly ending matter more than chapters and end cards. A score is decision-support, not a popularity ranking.
SYNTHESIS

A flawless image in service of one trick: pin-sharp at native 4K, cleanly exposed, and mastered right on the −14 LUFS target. The gap to a higher score is the format itself — one shaky 10.4-second handheld take bottoms out the stability and rhythm measures, even where the single take is the whole point of the illusion.

SHARPNESS 100/100 LOUDNESS −14.8LUFS NOISE FLOOR −36dBFS SHAKE 43.0px ASL 10.4s
YOUR PRIORITIES · 5 ADVISORIES

Fix these first, in this order.

Quick win = fast re-export tweak · Edit = fix in post · Shoot = may need a reshoot.

1
ShootEditC · Stability & Motion
The handheld shake is heavy, even by run-and-gun standards

Median frame movement measures 43.0 px, with 16 spans flagged very unstable — past what the short-form threshold tolerates as handheld energy. It also works against the gag: the steadier the camera, the more seamless the illusion reads.

How — Stabilise in post (warp stabiliser), or shoot the take on a gimbal — the trick survives either.
whole video
2
EditC · Stability & Motion
Residual jitter rides on top of the bigger moves

High-frequency judder measures 71.5 px at the 75th percentile — the fine, twitchy component that a stabiliser pass often leaves behind. On a phone held at arm's length it reads as harshness rather than energy.

How — Smooth the residual shake in the edit (a second, gentler stabilise pass), or firm up the handheld grip on the next take.
whole video
3
EditE · Audio Loudness
Audio levels jump hard between beats

Level jumps reach 25 dB (p95 17 dB) inside ten seconds. The master itself sits right on target at −14.8 LUFS — it's the moment-to-moment ride that lurches, so on a phone speaker the quiet setup ducks under and the final yell spikes.

How — Ride the gain so the dialogue and the payoff sit within a few dB of each other, then re-check the master.
whole mix
4
EditH · Editing & Rhythm
One 10.4-second take where the genre expects a cut every second or two

The whole Short is a single shot: ASL 10.4 s against a 1–2 s short-form target, so the rhythm measures bottom out by definition. Here the one-take is deliberate — the illusion only works uncut — but the engine scores the rhythm it can measure, and anything that re-energizes the frame without cutting claws it back.

How — Keep the take, add motion beats: a punch-in on the rug, a snap zoom, or a caption pop — events that work like cuts without breaking the trick.
whole video
5
EditH · Editing & Rhythm
Nothing interrupts the pattern across the whole runtime

100% of the video plays in takes longer than 8 s, with 0 cuts, zooms or inserts detected. At ten seconds the cost is small, but the hook-strength measure (0 cuts in 10 s) reads the open as static even though the rug itself is doing hook duty.

How — Same medicine as the shot-length note: one visual event in the first seconds — a snap zoom on the "hole", a text beat — breaks the pattern without a cut.
whole video
STRENGTHS · KEEP DOING THIS

Pin-sharp, true 4K

The subject is sharp on 100% of usable frames, noise sigma 2.0, blocking 1.1% — and the detail confirms ~2160p effective resolution, not an upscale. Sharpness & Technical scores 100 across every measure.

A tight, filler-free delivery

225 wpm with 0 filler words and 0 dead-air silences across the 31 spoken words — every line lands setup, warning or payoff. Voice & Speech scores 100.

Mastered on target

−14.8 LUFS integrated against the −14 target, peaks at −5.6 dBTP under the −1 ceiling, 0.00% clipped samples. The master is right — the moment-to-moment level ride is the only audio fix.

CONTENT ANALYSIS

What the video is actually saying.

A clean one-gag premise with an instant visual hook. What the structure score punishes is the plain spoken open and the abrupt cut-out — the framing, not the idea.
Synopsis
A ten-second in-camera illusion: an op-art rug that, from one angle, "gives the perception that there's a hole" — Zach introduces it in a single line, warns young Mason not to step on it, and the bit pays off on a final yell.
Message
Pure visual play — no lesson, no pitch: the pleasure of a perspective trick executed cleanly in one take.
Intended audience
Broad short-form feed viewers — all-ages magic and illusion content, built to be understood with zero context.
Emotional arc
Curiosity (what is that rug?) → mock danger (the warning to Mason) → surprise payoff on the yell, all inside ten seconds.
Themes
illusionperspectivemagicfamily gagshort-form
Structure
One continuous take the engine reads almost entirely as hook, with no intro, no outro and no end CTA — it simply cuts out on the punchline.
Strengths
  • A premise legible in one second — the rug itself is the hook
  • The trick is sold in-camera: zero cuts leaves nothing to expose
Conventions spotted
  • the abrupt cut-out ending — standard Shorts grammar to feed the loop
  • the "don't step on it" warning — telegraphing the gag before paying it off
Ways to tighten it Steady the take — the illusion reads even cleaner off a gimbal or with a stabilise pass (median shake 43.0 px) · ride the audio so the setup and the yell sit closer together (jumps up to 25 dB) · give the text overlays a backing or shadow — at 2.1:1 contrast they're doing no work.
CHAPTER SUMMARY · 1 SECTION DETECTED
Ch.1The rug with the hole — Zach introduces the illusion rug and the angle that sells it, warns Mason off "the hole", and the take cuts out on the payoff yell.

Sections and their boundaries are auto-detected from cut density and audio energy; titles summarize the transcript of each span. At ten seconds, one section is the expected result.

SCORES BY THEME · A–L

Twelve themes, each on a 0–100 dial.

Exposure & Color
Brightness, contrast, white balance.
Sharpness & Technical
Focus and image quality.
Stability & Motion
Camera steadiness, movement.
Composition & Framing
Subject placement, framing.
Audio Loudness
Level & upload-standard compliance.
Audio Quality & Balance
Cleanliness, balance, noise.
Voice & Speech
Pace, fillers, silences.
Editing & Rhythm
Cuts, pacing, dynamics.
On-screen Text
Presence and legibility.
Narrative Structure
Hook, body, ending.
Platform & Metadata
Resolution, codec, aspect.
Accessibility & Safety
Captions, photosensitivity.
STRUCTURE & RHYTHM

The whole video, on one timeline.

This frieze unrolls all ten seconds left to right, from the real analysis. Top to bottom: structure (hook vs. body), editing rhythm (bars = cut density — flat here, since there are no cuts), audio level, and which passages show a face to camera vs. b-roll.
Structure
Rhythm
Sound
Face
0:000:020:040:060:080:10
HookFace to cameraB-rollAudio level

Reading: hook 0:00–0:10 · no outro · 1 section · ASL 10.4 s · 0 cuts · 100% b-roll, 0% face to camera.

STORY-BOARD

One real, representative frame per detected section, extracted at the timestamp shown (clap-style hours:minutes:seconds:frames). A single section means a single frame here.

Zach King sits on a couch gesturing toward a black-and-white spiral illusion rug that appears to be a hole in the living-room floor, as a child enters from the left
00:00:00:00
The illusion rug, staged in one frame

Frames are pulled straight from the source file at each section's representative timestamp.

EVIDENCE · IMAGE

What it flagged — and what it didn't.

When the engine docks a score it captures the moment. It also tells format from defect — the 9:16 vertical frame is the Short's native shape, scored 100, not docked against a 16:9 standard.

The single wide composition of the take: Zach King on the couch, the illusion rug in the foreground, the child at frame left
00:00:00:00H · Rhythm
One composition carries the whole Short — 0 cuts, a 10.4 s take against a 1–2 s genre target.
The same frame read for framing: a tall 9:16 vertical composition with the rug anchoring the lower half
00:00:00:00Not a defect
Native 9:16 vertical framing — the format's natural shape, scored 100, not treated as a framing error.
EVIDENCE · AUDIO

The signal behind the sound.

E · LOUDNESS WAVEFORM −14.8 LUFS · −5.6 dBTP
00:00EBU R128 · TARGET −14 · PEAK −10:10
G · VOICE & PACING
Speaking pace225 wpm
Filler words0 /100 words
Dead-air silences0 > 3s
Background floor−36 dBFS
TRANSCRIPTION · COMPLETE

Auto-transcribed locally (whisper). Language: EN · 31 words · 79% speech. At ten seconds, this is the full transcript.

This is an illusion rug.
And from one angle, it gives the perception
that there's a hole in the car.
Oh Mason, don't step on that.
Hey buddy, let's go.
Ah!
DETAILED ANALYSIS

Theme by theme, measure by measure.

Expand any theme for its individual measures, values, and the standards behind them. The blue "good to know" boxes explain the technical terms.

BSharpness & Technical100
Good
Sharpness / focussubject sharp on 100% of usable shots100

Critical focus holds on every usable frame — the rug's pattern and the subjects stay crisp through the whole handheld take.

Good to know “Sharpness” is how crisp the detail is — soft footage often means missed focus or an upscale.
Good
Out-of-focus shots0% of shots missed focus (dark shots excluded)100

No focus misses anywhere in the take.

Good
Noise (ISO grain)noise sigma 2.0100

A very clean image — well lit, with no visible ISO grain.

Good
Compression artifactsblocking 1.1% (8×8 grid)100

No visible macroblocking — notable given how hard the rug's high-contrast pattern pushes the encoder.

Good
Real definition (upscale?)HF detail 32.1% · ~2160p effective / 3840p100

A 9:16 frame at 2160×3840 is 4K rotated to portrait — measured detail fills the frame's 2160-pixel narrow dimension with no upscaling fingerprint.

GVoice & Speech100
Info
Speaking pace225 wpm · 79% speech (narrative dialogue)

Quick but clear — read as in-scene narrative dialogue rather than presentation, so it's reported instead of scored.

Good
Filler words0 fillers (0.0 / 100 words)100

Zero fillers across the 31 spoken words — in a ten-second Short, every word earns its place.

Good to know Filler words are “um / like / you know”. A high rate per 100 words distracts and undercuts authority.
Info
Breathing / silences0 silence(s) > 3s · longest 0s (normal for narrative dialogue)

No dead air at all — at this length there's no room for it, and the engine treats that as normal for the format.

LAccessibility & Safety100
Good
Photosensitivity (screen)0 strong light transitions (~0/min, sampled 2.0 fps)100

No strong luminance flashes detected — nothing that could trigger photosensitive viewers.

AExposure & Color94
Good
Exposure (overall)mean luminance 54%100

Almost perfectly centered — the bright room reads clean without washing out.

Good to know Exposure is how much light is in the image — neither crushed (lost shadow detail) nor "blown" (white with no detail).
Good
Blown highlights0.1% of pixels blown100

The white walls and the rug's light sections hold full detail.

Good
Crushed shadows0.2% of pixels crushed100

The blacks of the rug stay detailed instead of collapsing to ink — which matters when the rug is the trick.

Good
Dynamic range usedspread 85%85

A healthy spread between the rug's blacks and the bright walls — most of the available range is in use.

Good
ContrastRMS contrast 0.28100

Right where a clean image sits — punchy without being harsh.

Good
White balancewarm (red) cast 7%88

A slight warm bias that suits the indoor scene — not worth correcting on its own.

Good to know White balance is the overall colour temperature — a cast pulls the whole image warm or cool.
Watch
Saturationmean saturation 17%74

The palette reads muted — true to a frame dominated by a black-and-white rug, but a small lift would help the image pop in a feed.

Good
Color consistencydrift 8%100

Effectively a single consistent grade — as you'd expect from one continuous shot.

Good
Chroma noisecolor-noise index 0.9100

No chroma speckle in the shadows.

DComposition & Framing92
Good
Rule of thirds / placement13% offset from the power point85

Close to textbook — the subject sits near a power point while the rug anchors the lower half of the vertical frame.

Info
Frame clutteredge density 28%

Most of the edge density is the rug's high-contrast pattern — which is the subject — so it's reported rather than scored.

Good
Aspect ratio9:16 → 9:16 (vertical)100

Shot and delivered in the Short's native vertical shape — exactly what the platform expects.

KPlatform & Metadata91
Good
Resolution & frame rate2160x3840 @ 30fps100

Full vertical 4K at a standard frame rate — fully compliant for upload.

Good
Encoding (codec & bitrate)av1, 11.3 Mbps (av1 target ~20)82

A lean bitrate for 4K, but AV1 is efficient and the blocking measure (1.1%) confirms no visible artifacts.

FAudio Quality & Balance81
Watch
Background noise / hissfloor ~−36 dBFS64

Room tone is audible under the dialogue but not intrusive — a light denoise pass would clean it, though it's not urgent at this level.

Good to know The "noise floor" is the level of the quiet parts. Closer to silence (lower dBFS) is cleaner.
Good
Stereo balance−0.0 dB (left)100

Dead centered — no left/right imbalance.

EAudio Loudness72
Good
Integrated loudness−14.8 LUFS (target −14)100

The master lands essentially on the platform's normalization point — it plays back at the level it was mixed at.

Good to know LUFS measures perceived loudness over the whole video. Platforms normalize toward −14 LUFS.
Good
True peak−5.6 dBTP (max −1)100

Generous headroom under the −1 ceiling — no clipping risk on transcode.

Good to know True peak (dBTP) estimates the real peak between samples; over −1 risks clipping on transcode.
Watch
Loudness range (dynamics)1.6 LU60

A very compressed macro-dynamic — common in short-form masters, but it leaves the mix little room to breathe.

Good
Audio clipping0.00% of samples clipped100

A clean signal end to end.

Fix
Level consistencylevel jumps up to 25 dB (p95 17 dB)0

Moment-to-moment levels lurch — the spoken setup and the final yell live at very different volumes. Ride the gain so nothing spikes or vanishes; this is the one genuine audio fix in the file.

JNarrative Structure50
Fix
Structure (hook · body · outro)weak hook · no clean ending30

The take opens on plain setup dialogue and simply cuts out on the punchline. The abrupt out is partly the loop-friendly grammar of Shorts — but a sharper first second would still earn this score back.

Good
Chaptering1 narrative section detected85

One section across ten seconds — exactly the right amount of structure at this length.

Good to know This measures detected narrative sections, not YouTube chapter markers.
Info
Branding (intro / outro)no intro · no outro

Normal for a Short — reported for completeness, not penalized.

Info
Call-to-action (ending)no end CTA detected

Shorts often skip the end CTA deliberately to keep the loop tight — reported, not scored.

Fix
Sustained engagement / tensionhook, re-engagement, variety, audio35

A composite of hook strength, re-engagement beats, shot variety and audio dynamics — all of which read low on a single uncut take. It's the same story the rhythm theme tells, seen from the retention side.

IOn-screen Text50
Info
On-screen text presencetext on ~10% of shots · 3 overlays read

A light text presence — three overlays picked up by OCR. Reported, not scored.

Fix
Text legibility (contrast)median contrast 2.1:1 · 100% under 4.5:10

Every overlay sits below the readability threshold — the text is decoration at this contrast. A backing plate or drop shadow fixes it in the edit.

Good to know Contrast is the brightness gap between text and what’s behind it; ~4.5:1 keeps it readable.
Good
Line lengthmedian line 6 chars (max 9)100

Short, scannable lines — right for a vertical frame.

CStability & Motion45
Fix
Stabilitymedian shake 43.0 px · 16 very unstable span(s)0

Heavy shake even by handheld standards — the top item in the priorities. On a ten-second clip the engine samples densely enough to measure true shake, and it bottoms out the score.

Good to know Measuring true shake needs frames close together in time; on long videos it’s read from motion fluidity.
Fix
Micro-jitterresidual jitter 71.5 px (p75)0

High-frequency judder on top of the bigger moves — the component a stabiliser pass tends to leave behind, and the harshest part on a phone screen.

Good
Motion fluidityspeed irregularity 0.48100

The broader camera path is smooth and continuous — the problem is the shake riding on it, not the moves themselves.

Info
Movement typeshoulder-held (handheld)

Detected as handheld — consistent with the run-and-gun look of the take, and the context the stability thresholds are set against.

Good
Horizon levelhorizon ~−3.0°83

A slight persistent lean — minor, and barely readable inside a vertical frame.

HEditing & Rhythm22
Info
Shot segmentation1 shot · 0.0 cuts/min

The entire Short is one continuous take — which is the trick: the illusion is sold in-camera, not in the edit.

Fix
Average shot length (ASL)10.4s (target 1–2s · short)0

One 10.4 s shot against a 1–2 s short-form target — the measure bottoms out by definition on a one-take video. Deliberate here, but it's what the rhythm score sees.

Good to know A “shot” is the span between two cuts. ASL is the average shot length — lower means a faster cut.
Watch
Shot-length varietycoefficient of variation 0.0050

With a single shot there's no variety to measure, so the score sits at the neutral midpoint.

Info
Rhythm curvedynamics 0.0 (cuts / 5s)

Flat by construction — there are no cuts to plot.

Fix
Hook strength (0–30s)0 cuts in 10s40

The open relies entirely on the spoken setup and the rug itself — a single visual event in the first seconds would lift this without touching the take.

Fix
Pattern interrupts100% of runtime in long takes (>8s)0

Nothing breaks the pattern — no zoom, insert or caption beat. A punch-in on the "hole" would register here without breaking the illusion.

Info
Jump cuts0 shots < 1s (0% of shots)

No jump-cut grammar in this video — consistent with the single take.

Info
B-roll / face-cam ratio~100% b-roll · 0% face to camera

At this wide framing no sustained face-to-camera span is detected — the whole take reads as scene footage.

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