Breaking YouTube Severity: low
YouTube videos.list mostPopular chart changes source on 21 July 2025
What changed
The 10 July 2025 revision history entry says that from 21 July 2025 the mostPopular chart of videos.list draws from the Trending Music, Movies and Gaming charts instead of Trending Now. This follows the deprecation of the Trending page.
What it means
The mostPopular chart no longer matches the old Trending Now list.
Who is affected
Developers of trend research and content ideas tools that read the mostPopular chart.
What to do by 21 Jul 2025
Treat the chart as Trending Music, Movies and Gaming data and update any labels or logic that assumed general trending videos.
Primary sources
Checked against the source 26 Oct 2026
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