Create high quality content. Use a good camera, a good mic and learn how to edit the videos. A good video makes the difference. Then focus on the content. Do enough research so you know what you are talking about. Read the whitepaper and other publications about the project you want to review but make sure you don't copy someone's else content. Be original. After you've done all these, your channel will start growing if you get connected and promote it. Having a big audience and good content will get you good stakes which result in more money