YouTube video thumbnail size: 3,840 x 2,160 pixels
YouTube states a recommended size of 3,840 x 2,160 pixels for the video thumbnail (verified 2026年8月22日).
A platform limit, not a working scheduler
No connector has passed its definition of done. This page states what the platform enforces. It does not say that this product publishes there yet.
The recorded value
- Video thumbnail
- 3,840 x 2,16016:9, Recommended by the platform
Add custom thumbnails on YouTube 研究した2026年8月22日
Other image sizes recorded for YouTube
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