B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
10%
10% -- average view duration lift for YouTube long-form videos with chapter markers (2026)
YouTube long-form videos that add proper chapter markers see average view duration increase by 10% to 25% within the first month.
- Reported as a range between 10% and 25%
- Based on client channels managed by the agency
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
10%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
The Polar Bears
Primary
Tier B
https://www.thepolarbears.co.uk/insights/youtube-descriptions-that-drive-views ↗
Source Article
YouTube Descriptions That Drive Views (2026 Guide)
YouTube Descriptions That Drive Views (2026 Guide)
YouTube Descriptions That Drive Views
A YouTube description has three jobs: tell the algorithm what the video is about, give the viewer a reason to keep watching, and feed AI engines a clean summary they can cite. Most descriptions do none of those …
Original Research
The Polar Bears
· Original study ↗
Methodology
Agency-reported observation across managed client channels; midpoint of 10-25% range used. Corroborated by vidIQ analysis per the article.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
YouTube long-form videos with chapter markers: 10% average view duration lift. Source: The Polar Bears (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/youtube-timestamps-view-duration-lift
HTML Embed
<blockquote cite="https://lighthousedata.io/data/youtube-timestamps-view-duration-lift" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>10%</strong> -- average view duration lift for YouTube long-form videos with chapter markers<br><small>Source: The Polar Bears (2026) · <a href="https://lighthousedata.io/data/youtube-timestamps-view-duration-lift" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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