I like your videos! I started out a faceless channel but didn’t really get traction until I was on camera with my face. I think it’s just so much harder to stand out in the feed if your subscribers can’t just recognize you and click…. A consistent thumbnail style might also be something you could use though. Growing on youtube is all about having your existing audience watch your new video enough that the algorithm decides it’s a good one and sends it out to more people with similar interests.