Doesn't surprise me, Mr Beast recently posted that A/B testing showed that the classic open-mouth YouTuber Face thumbnails don't perform as well as the creepy dead smile does. Linus thinks Mr Beast is a YouTube Algorithm God (and should be president of the US!), so I'm sure he jumped on that.
Ranadok
joined 1 year ago
I think they only put them in when there's a long period with no captions. Usually at the beginning or end of a video, but I've had them during a silent/dialogue free scene in the middle of a movie before.