[sR.Kumo]

I've also been wanting to start a YouTube channel again, and I'm in a similar situation in that two years ago I too was uploading, but looking back, pretty much everything about it was horrible.
Sometimes, looking back puts me off starting to upload again, because I realize how horrible I was, and I can't not think that I'll possibly just be that horrible again

And also, I'd not have much to upload about, because being in Bronze I couldn't even really do casting, since I honestly don't have that sort of knowledge about SC2 >.> So I'd only really be uploading stuff like Minecraft, Tekkit, or some pretty bad SC2 gameplay >.>

Anyways, sorry for hijacking :P back on topic

As just about everyone has said, you should try to stay away from the very generic style of videos that people upload, and do something that makes you yourself.

From my point of view, even more important than the actual gameplay, you should be entertaining. I mean, a few years ago when I actively followed people on YouTube, what made me choose to watch one person over some other person, is that they were entertaining to listen to. For example, SeaNanners. I don't know why, but I always found him very interesting to listen to. Similarly, this applies with to various other youtubers as well.
I also recently started to just look for random very new and just starting youtube uploaders, and if I found them interesting - not gameplay, but simply listening to them talk, and I'd start actively following them :3 That's how I find youtubers I like now, rather than watching really popular ones anymore :P

Next, I find subscriber-base interaction to be quite nice, from a subscriber point of view (and honestly, it can be nice from the uploader point of view as well). I mean, if you're a SC2 streamer, playing arcade games or 2v2s for a laugh with random people watching your stream can be quite entertaining and nice for the viewer.
Similarly, if you're the uploader, you'd want to do something to interact with your viewers. Sure, when you only have a small number, that can be quite difficult because a lot just watch and go away, but once you hit a fair number, and you find a few viewers who generally indulge in conversation with you, you should take the extra step; this can be anything, from asking them what sort of uploads they'd like to see on the channel and what games they'd suggest trying out, to actually playing games with them and uploading that.
For games like minecraft, once get a good number of those types of viewers, you could also do something like host a server off your PC, and assign daily times when that server's up, or if you're willing to invest in it, set up a full time server and see if you can manage to actually get donations to keep it running. Or even just something as simple as playing on a server and inviting viewers to play with you.

<If I can think of anything else that might possibly help you, I'll post :3>