Random goofy faces where the person just does the same face everywhere is terrible, but if it’s a channel I know is serious about what they do (not necessarily serious as in never make a funny), I can understand that putting on an appropriate face for the content does send an easily understood message about what kind of video it is just by scrolling quickly. It’s not a bad thing to tell if it’s going to be a complaint video or a happy news video and the likes. Of course, the face value drops pretty quickly if it’s a random channel I’ve never seen, because I don’t know how relevant it really is and if that random person’s alleged feelings will inform what I can expect to feel in that video, or if it’s just random engagement bait that I don’t resonate with.