Every channel's a little different—I might get more initial views if released later in the day, but it seems like YouTube's algorithm is biased more towards how

Every channel's a little different—I might get more initial views if released later in the day, but it seems like YouTube's algorithm is biased more towards how the clickthrough rate and watch percentage go, then it gives another pass at a new audience on day two and sees if it changes—if it does, you can get a significant boost on the 2nd day (or I've seen up to a few days later, for a good video). The basic answer is more, "it's complicated"—but for me it's more convenient to release in the morning so I can check in on comments early on (sometimes I get some new ideas or re-test based on early comments for things I missed!).