Video ideas can be hard to come up with, but it all depends if you're dedicated to it or not. From your channel, I can see you're into BO3 videos. Now think about it, what can you do that's different from what other people are making on Black Ops 3? Maybe you can do a challenge series where your viewers decide what kind of weapons you use for a game and have a form of punishment if you can't get the amount of kills required like using only SMGs and doing the Cinnamon Challenge if you can't get more than 20 kills? It all depends on how you can come up with original videos and if it works out for you in the long run.