Check eligibility before comparing
The platform and placement determine which formats are eligible. Google’s video ad format guide distinguishes bumper, in-stream and other formats. A cut that suits one placement may not be eligible for another.
Use the duration your communication task needs within those constraints. Do not shorten a claim so much that an essential condition becomes unreadable or disappears.
Align the same story beats
Download the video-cut comparison sheet.
| Beat | Short cut | Medium cut | Long cut |
|---|---|---|---|
| Product identified | Record first clear timestamp | Same check | Same check |
| Benefit explained | Note what remains | Note added explanation | Note added explanation |
| Proof shown | Present, absent or unclear | Same check | Same check |
| Brand identifiable | Cue and readable duration | Same check | Same check |
| Offer and conditions | Readable in playback? | Same check | Same check |
The columns are a planning template, not results from three analyzed videos. Fill them from actual exports before ranking the cuts.
Review what was removed
A shorter cut is an editorial choice. List the scenes, words and proof points removed from the longer version. Ask whether each removal improves focus or creates a gap the audience cannot fill.
A familiar customer may need less explanation than a first-time buyer. That is a hypothesis about context, not a reason to assume one duration universally fits a demographic.
Review what the longer cut earns
Extra time should do a job: demonstrate a mechanism, establish a claim, explain a condition or resolve a likely question. If a scene adds atmosphere, decide whether that atmosphere supports the brief. Not every useful brand scene needs to carry a product instruction.
Watch at normal speed on the intended device. A timeline alone cannot show whether the transitions are intelligible or captions can be read.
Compare diagnostics fairly
When using RoastIQ, retain the same audience, platform and brief where the comparison allows it, and record the scoring version. Inspect coverage: a shorter ad and a longer ad may have different sampled-frame density. Do not infer continuous attention from isolated maps.
If the shorter version scores higher, ask which evidence changed. Do not assume that length caused the difference if the hook, offer or production also changed. The diagnostic supports a creative discussion; it does not establish campaign superiority.
Let live outcomes answer the performance question
For a controlled comparison, define the objective, audience, placement, metric and analysis window. Google’s video experiment setup provides one implementation. Different placements or unequal delivery can limit how cleanly a result compares duration.
The final recommendation may be one cut for one role and another for a different role. Explain that division with evidence rather than forcing a single winner across incompatible contexts.
Make the call
Use the decision matrix to identify what to back, what to preserve and what still needs checking. Use the heatmap worksheet when the question concerns specific visual moments. Watch the product workflow for the wider review process.