Recently, YouTube has teased a function that enables content creators to conduct A/B testing on their thumbnails - rolling out to every creator in 2024. This will allow you to present two distinct thumbnails for a single video, with YouTube alternating their display among your audience randomly. Following a set timeframe, YouTube offers data illustrating which of the thumbnails yielded better results regarding viewer count, amplified viewing duration, or propelled engagement. This will revolutionize the process by allowing you to base your thumbnail decisions on actual data. Until then, you can do manual A/B tests for thumbnails, as documented on our YouTube channel.