Article · Help page
A/B test titles and thumbnails (YouTube Test & compare)
YouTube Help · support.google.com Free Beginner
YouTube's own help page for its built-in A/B test: creators can test and compare up to 3 titles and thumbnails on one video, and YouTube picks the winner.
- Test up to 3 different titles and thumbnails on one video.
- At the end, the version with the best result is applied.
- Test thumbnails that differ clearly, not small tweaks.