nty, it's hard to advertise something with little to no content, and you can't really advertise youtube channels effectively unless the content is great.
Use the google adsense they provide, it's effective at targeting and advertising to your audience and will do it better than anyone else.
Also the point of youtube is to make exceptional content, have it viewed and shared because it's so great and expand from there.
Not just hey look at this the billionth minecraft lets play with poor audio mastering, WATCH THIS. "you got wood" hehehehehhe
Sorry for the criticism, but your either first at a game market or your not getting in unless your contents great...
ditch minecraft and call of duty, try covering new exciting games everyone wants to know about!