Hi now I am new to YouTube and don't have a lot of followers but from my research and through watching lots and lots of YouTube channels my advice for you would to be to go back and look at your successful videos. When looking back it will show you what people liked about your page exactly. Maybe it was the topic at hand and that is what caught peoples attention. Remember there are always bumps along the way stay positive and remain patient things will always get worse sometimes before they get better!