I’d highly recommend not doing this as you’ll get YouTube as well as all of its partners on your case. Unless you want to deal with lawsuits, cease and desists, and other types of legal jargon probably not a good idea. If you want to take the risk to do it illegally or against YT policy then that’s a different story. Any type of stealing customers from another site or business is illegal and there’s many laws against preventing this from happening. If you do decide to go through with it good luck fighting with YouTube if you get too big, they won’t like you stealing revenue from them especially when it is from their own or prior customers.