YouTube and streaming is a game of luck, that's it. You can know how to game the algorithm (thumbnails, video length, titles) but that's not enough. Getting a boost from streamers watching your videos really help, or even someone posting it on reddit, but that's all luck. There have been some big names who try and "start over" to see how easy/hard it is to be successful using their current knowledge and hiding their name, Ludwig is the first that comes to mind. Even with their knowledge, it's hard to get off the ground.
But there is some effort the creator has to do. They have to make good quality videos (as in good video/audio quality, maybe editing skills too), and also have to try advertising themselves. Post on Twitter or reddit, but just making a video and sitting around won't help.
I am a juggler/prop manipulator/fire performer, here's my channel:
http://www.youtube.com/user/markconigliaro