How YoTrend measures YouTube trends

Current video lists originate from the YouTube Data API ranking for a specific country and category. YoTrend schedules all 16 selectable countries across music, gaming and entertainment categories. The source is the YouTube Data API mostPopular chart, rather than a measurement of every video or viewer in a country.

A stored ranking is linked to its country, category and UTC capture time. Video titles, channel names, thumbnails and public engagement totals may also come from YouTube.

The scheduled production capture runs once per day. Each successful run stores a dated snapshot; the interface displays its age and warns when it is older than expected.

Each country has a daily collection window, staggered across UTC hours to spread the workload. Opening a chart also attempts to recover missing data or a capture at least 26 hours old. If that attempt fails, the last successful capture remains visible with its original date.

Incomplete or failed captures do not replace the last complete ranking. Older captures with unverified coverage remain available when no complete chart exists, with movement unavailable. If stored data cannot be read, the page reports that data is unavailable.

Movement is the previous stored rank minus the current rank. A positive number means the video climbed; a negative number means it dropped. Stable means its rank did not change.

For example, moving from #12 to #7 is a rise of 5 places, not 5% growth. Every video is compared against the same previous complete chart in its country and category. The exact capture dates are displayed; missed updates can make the interval longer than one day. With fewer than two verified complete charts, comparisons are unavailable. Views are worldwide totals recorded at capture time, not local views or daily gains.

First recorded

Present now, absent from the previous complete chart, with no earlier stored observation in this ranking. This does not mean newly uploaded.

Re-entry

Present now and recorded before, but absent from the previous complete chart. No rank movement is inferred across that absence.

Entered / left

Membership changes between complete captures of up to 50 videos. Leaving this chart does not mean leaving YouTube or losing popularity everywhere.

New peak

The best numerical rank reached across stored observations.

Days trending

The number of UTC calendar days represented by stored observations, not continuous watch time.

Trend score

A deterministic summary of ranking position, movement and available history. It is not a forecast.

YouTube rankings can change between captures. A missing observation does not prove that a video stopped being popular, and country rankings do not represent every viewer in that country.

YoTrend does not claim that ranking position is equivalent to total popularity or virality. When data is unavailable, the site shows an unavailable state rather than generating substitute rankings.