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Monitor YT records observations of public YouTube pages. It does not have access to a channel owner’s private YouTube Analytics or Studio experiment results.

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Collection schedule

These are scheduling targets, not delivery guarantees. Capacity, YouTube responses, rate limits, and temporary fetch failures can delay an observation.

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What upload discovery includes

New upload discovery uses a channel’s public long-form Atom feed. It does not discover Shorts, livestreams, private videos, or members-only uploads. A historical members_only_changed event can still appear for a video known from older collection behavior.

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How title and thumbnail changes are detected

A new observed value creates a normal change event. If a previous value returns, Monitor YT treats the repeated sequence as evidence of rotation and groups two or three variants into an A/B test event. Title observations come from the public watch page. Thumbnail observations come from the impression-served channel videos grid, because the canonical YouTube thumbnail URL can remain pinned while YouTube rotates experimental variants. If a detected rotation remains on one variant for three days, Monitor YT creates a concluded event containing the variants and final observed value.
Rotation is inferred from public observations. The final observed value is not confirmation of YouTube’s private experiment verdict, and a missed observation can hide a short-lived variant.

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Public stats

View, like, comment, and subscriber counts come from public YouTube data. Values can be absent, delayed, or rounded. Monitor YT stores samples rather than continuous telemetry, so graphs connect discrete observations. Subscriber events are milestone events rather than notifications for every visible movement. They occur when the rounded count crosses a 1,000-subscriber boundary below 1 million or a 10,000-subscriber boundary at or above 1 million, in either direction.

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Observation time versus event time

An event timestamp records when Monitor YT’s sample says a transition occurred. Because collection is periodic, it should be read as “observed by this time,” not as an exact YouTube edit timestamp.