Hey, Ross! First, let me apologize for my english in advance I want to give you some advice - one of the problem is that you don't make any content that can be really massively popular. Your popular videos are - either HL-HL2 related or about a bit obscure games, like in the GameDungeon. Well, HL is pretty popular game, but its popularity is declining, and it isnt what it used to be, say, back in 2007. So, you have to start one more series, that will have a potential to become a view-attracting machine to your channel - review new games! Or, do anything at all, but with New, Hot games that are on #1 popularity right now.
Ok, I may sound like i'm over-confident in what I'm saying - but theres a reason for that, I have a pretty big experience in internet and social media marketing, although in Russian market, but internet and its inhabitants are pretty the same everywhere.
And, I don't wont to sund like what you do right now is bad - no, it's super good, and I like your content a lot, but sometimes, in order to make money, you have to do not what's best, but just what is popular.
PS you've got my 20$