YouTube is letting content creators test the performance of multiple thumbnails. The company first announced the feature in June 2023 for a small number of creators, but now the ‘Thumbnail Test and Compare’ tool is being rolled out to “all creators with access to advanced features”. In a post from the YouTube team, they said: “Thumbnail Test and Compare is a feature that lets you upload up to three video thumbnails to test with viewers to help pick your winner. “Some people call this A/B testing, but Test and Compare takes it even further with up to three thumbnail options!” The feature displa…