I have a gaming channel too and theres one thing that ive noticed that somewhat upsetting but has also helped me out a bit.
First off I play Pokemon games so it doesnt get much more broad than that, but there are several different variants and ways to do it, so one of the ways i really push myself is by uploading about 3 videos a day, then streaming on the weekends, i consider it original because im much more active than many people who do the same exact thing.
Now what made me upset was i used to always take advice from comments from people.
For example, I had a series that would get a good majority of my views, but i only uploaded it once a week, then someone said they would love to see it as a daily series. I made it daily, and at first it got a lot of views, then it slowly started going down. Now ive changed my schedule again, and lowered how much i upload that series and its back to its normal views. So one of the things that i think helps is constantly changing what you upload, doing large varieties and then circling back around to them seems to keep people interested in what youre doing!