If you're going to read one post in this thread, read mine.
It's definitely possible if you truly learn what people want to watch. But just know that it's not just making videos, you have to be constantly improving your videos. Most people say this but they don't follow through. Seriously, your videos need to be THE BEST, and then you will get a lot of viewers and it will be no problem making a living. I hate to say it but 99% of the time when someone says "I have good content," I take a look and just by looking I can tell it's not marketable.
I haven't really looked at your videos but you seem to have a decent number of views and subscribers, so you probably already know what I'm talking about. Don't lie to yourself and say "well this video will be good enough", because you will know it's not, and you will know the reason it doesn't get a lot of views. I've done this enough times myself where I know I'm putting out a crap video, and low and behold, there are less views on it.
My next point is if you're going to do it full time, that means FULL TIME. Treat it like a job, 9 hours a day. Just imagine what kind of videos you'd be able to make if you spent 9 hours a day learning how to edit videos, new video techniques, etc. People who say they want to make YouTube their job rarely treat it like one, then quit after they don't magically get rich without putting in the work.
Finally, let me tell you something. The other people who have been discouraging you, screw em. Seriously. If you really want to do this, then grab it by the balls and give it your all. And I really do mean all. If you get lazy, you WILL fail. The professional puts in his time even when he doesn't want to, no matter what. All that being said, you really have to want it, and you cannot slack off on something like this because the people on YouTube will refuse to watch anything but the absolute best. YouTube is NOT easy; as a matter of fact, it's probably harder than a desk job. Don't do YouTube because you think it will be all fun and games.