No, you can't do A/B test on YouTube unless you're in the 1% of beta testers. They've postponed this feature's release for +5 year now.
Hence why Thumbnail Test is the #1 thumbnail A/B Tester.
You can A/B Test YouTube thumbnails with Thumbnail Test in 5 steps:
The #1 reason to choose Thumbnail Test is because you obviously can't A/B test through YouTube itself.
Furthermore, Thumbnail Test lets you perform these A/B Tests daily or hourly — something that only our tool can do.
Besides, we're always here for you! Shoot any question and we'll gladly help 😇