YouTube Introduces Thumbnail A/B Testing for All Creators

The new tool allows creators to test up to three thumbnails per video to determine which drives the most watch time.

Creators can now test multiple thumbnails to see which one performs best.
The testing process can take from a few days to two weeks depending on impressions.
YouTube's tool focuses on optimizing watch time rather than click-through rates.
The feature is available on YouTube Studio for desktop with advanced features enabled.
YouTube is working on expanding the tool's availability to mobile devices.