beta

The belief ledger

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

agrees

the belief matches this channel's data

Held 10 days · Last changed Sep 5, 2026 · 2 changes

agrees on 1 of 4 pooled public channels · disagrees on 2

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

6 min· retention 19%· belief expects 10 min

Checked on 14 videos ·

How the verdict has moved

  1. Sep 13, 2026 – Sep 14, 2026agrees
  2. Sep 11, 2026 – Sep 12, 2026agrees
  3. Sep 7, 2026 – Sep 10, 2026agrees
  4. Sep 5, 2026 – Sep 6, 2026agrees
  5. Sep 3, 2026 – Sep 4, 2026disagrees
  6. Sep 2, 2026disagrees
  7. Aug 22, 2026 – Sep 1, 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 @iamartharrison’s tracked data, through Sep 14, 2026. The tally above reads 4 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.