beta

The belief ledger

“Videos 8–10 minutes long perform best for ad revenue and watch time.”

disagrees

the data runs the other way here

Held 14 days · Last changed Oct 9, 2026 · 3 changes

disagrees on 4 of 5 pooled public channels

What the check does

Bucket videos by duration (60/180/360/600/1200/1800/3600+ sec). Median weighted CTR, AVD, retention pct, sub conversion per bucket. Agrees if 600s bucket has the highest median weighted retention pct.

The reading

1 min· retention 42%· belief expects 10 min

Checked on 42 videos ·

How the verdict has moved

  1. Oct 9, 2026 – Oct 22, 2026disagrees
  2. Oct 7, 2026 – Oct 8, 2026agrees
  3. Oct 6, 2026agrees
  4. Oct 2, 2026 – Oct 5, 2026agrees
  5. Sep 26, 2026 – Oct 1, 2026agrees
  6. Sep 24, 2026 – Sep 25, 2026disagrees
  7. Sep 16, 2026 – Sep 23, 2026disagrees
  8. Sep 11, 2026 – Sep 15, 2026inconclusive

Where the belief comes from

Creator-economy folklore; pre-2018 mid-roll-ad threshold.

Checked against

Every figure on this page is checked against @theartharrison’s tracked data, through Oct 22, 2026. The tally above reads 5 pooled public channels’ files.

Keep reading

The rest of the record

This belief sits in a ledger of fifty, each one re-checked every day. These surfaces carry the rest of it.

Back to the belief ledger

Every belief on record, what changed in the last 90 days, and the verdict words explained.

How the record is made

The path a number takes from YouTube to this page, every condition attached to it, and what the projections have been worth.

Benchmarks

What channels in the shared pool actually run at, and how a video's views build day by day.