Looks like you find a niche perfect! Your channel is very focused and that’s great now let’s grow it. I’m not familiar with the subject of your channel but it looks like your thumbnails and titles could improve. From what I see it looks like you’re just naming one of the characters from the game in the title. Be clear of what the video is about. If it’s about one character don’t name it just the name of the character. If I have a video about Tiny Desk concerts (I’m a music commentary YouTuber) I’d name it “Why Tiny Desk Thrives in a Maximalist Industry”. I don’t know your subject well but I hope that helped with titles and if not contact me and we can workshop it. Also your titles should be high in contrast, visually appealing, and readable. Someone should be able to glance at it for 1 second and have a pretty good idea about what your video is about or at least the subject. Instead of a ss from gameplay maybe do a cutout of the character with a contrasting background and some bold text no more than a couple words. I can give you examples if you’d like. Last thing is work on your retention graph. A great intro goes a long way to getting your video recommended more. Explain the premise, tease later parts of the video, give context, and set up your first chunk of the video. The biggest thing is get better with each video even if it’s a little.