Grade HDR Once, Keep the SDR Downmap
Grade Rec.2020 PQ or HLG once, roll off highlights, and QC two stills of the same frame so the SDR YouTube downmap does not crush the HDR master.
9 min read
Mine rewatch spikes for your next thumbnail
A bump above the retention line is a moment the audience chose. Turn spikes into thumbnails, clips, and re-hooks, then test them against a control.
8 min read
'No clear winner' is a result
An inconclusive Test & Compare result is information, not a glitch. Why variants were too similar or impressions too thin, and what to change before you re-run.
9 min read
Part 2 inherits Part 1's audience
Finishing Part 1 is a strong interest signal, so Part 2 often arrives without search. Build a Part 1 that earns the handoff, then track their views ratio.
9 min read
Size a thumbnail test by impressions
A two-point CTR gap is invisible until each variant has thousands of impressions. Here is the sizing math, and which videos are worth testing.
8 min read
Structure a back catalogue into seasons
YouTube Shows turn playlists into seasons, but grouping has to match how viewers arrive. A clustering method, plus the playlist metric to watch after.
9 min read
Test & Compare picks watch time, not CTR
YouTube Test & Compare crowns the variant with the highest watch time, not CTR. Why a winner can lose the click race and why Studio CTR is the wrong comparison.
9 min read
What Test & Compare won't let you test
Shorts, Made for Kids, private, and age-restricted videos cannot run Test & Compare. The eligibility matrix, what stops a live test, and workarounds.
9 min read
What YouTube's AI disclosure does not cover
YouTube exempts animation, beauty filters, colour work, effects, your cloned voice, captions and audio repair. Decide in one pass if a video needs the label.
9 min read
Where YouTube puts your AI label
Since May 2026, photorealistic AI labels sit below the long-form player and overlay Shorts. Unrealistic and minor edits stay in the expanded description.
9 min read
YouTube auto-labels AI from C2PA metadata
YouTube applies AI labels from three sources you don't fully control. Know which ones fire automatically before you decide what the upload toggle is for.
9 min read
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