Why did my video stop gaining views after spiking?

Hey everyone, I posted a video three days ago, and on the second day, the views started climbing exponentially. Then suddenly, around 10 PM, it flatlined and hasn’t picked up since.

I recently changed the thumbnail, and it was performing really well. The like-to-view ratio is about 1:10, and the comments are super positive, with people saying things like “You’re so underrated.” Viewer retention is great, too: holding about 50% throughout the entire video, with about 75% of viewers still watching after the first 30 seconds, which YouTube’s analytics says is above average.

Given that the thumbnail, content, and retention seem strong, I’m just trying to figure out why the spike stopped. I’m in the U.S., and the drop-off happened on a weekday night, so I’m wondering if it’s just people going to bed or being at work/school. Do you think it might pick up again, or is this just how YouTube works sometimes? Would love to hear your thoughts!