I'm going to just review your two Don't Starve videos, just since the other ones are really old.
First and foremost, you need to get EXCITED. You sound bored to death in your videos. You don't talk a whole lot, there are a lot of pauses between commentary, and you're so quiet. You say some funny thing at times, but you need to have commentary that instantly grabs the viewer, and I'll be honest, your commentary didn't do that for me. Not because you're boring, but when you sound bored, it has a radiating effect on your viewers. It's a problem I have as well, and something I've been working on, but just think of it this way: how you sound, is how your viewers will feel. Try to be louder, maybe turn your mic volume up during the editing phase, speak with some emotion!!! You say some really entertaining things, and you're funny, but you have to sell it. It's not always about what you say, but how you say it!
Now, some positives, you have high quality videos, even in 360p your videos are beautiful! Yes, most people have HD, but your HD is nice, not fake or ugly. Your videos are really sharp, and it's pleasing to the eye. Overall, you seem to have potential, just try to work on your emotion a bit, and I think you could have a really good thing going for you!