Minecraft is a good game, but you need to post unique content
http://imgur.com/x7jKGhG
if you made a hunger games video, it would literally be one out of a million, so make unique things. In the minecraft community, I would recommend some not as popular mods and original redstone creations. I mean, if you're the only one who posted it, who else to watch but you, right?
Also, try and make sure those videos you make are funny/interesting. If you have a passion, this should be fairly easy as you don't want to force yourself to make videos just because minecraft has a large community. Make sure they take hold of the viewer (A good tip is adding in the best highlight of the video before your intro), as you want people to actually watch them.
As for recording, be sure to put effort in. Would you rather have a viewer that laughs once, mabye leaves a like, then goes on to the next suggested video, or someone who subscribes and looks at your other videos?
I hope this is considered good advice as i am a small youtuber myself