Well that name is really catchy. But if you want to change it, I'd say it's best to change it when you're a small channel. When you change your username it's like a whole rebranding. You want to make it as easy as possible for your audience to recognize your brand asap so if it's any possibility, I'd just leave the name how it is. But if you want to change it, do it before the channel grows larger. Just what I think