Youtube Gaming. Ah, that's a fun job. (If you're doing it as a job.) Sort of. Sometimes.
Your computer always has to be in tip-top condition, lest your recording have an un-compettitive framerate/resolution and the game itself lag, you'll have to spend hours editting, you have to have some semblance of skill in playing while you're talking otherwise it'll be a fail-fest and you'll end up looking like an ass who doesn't know what he's talking about... And most of all, you have to find time to do it. All the time... You'll notice how Markiplier, the Grumps, and countless others, whenever they start to talk about their lives, have this complaint in common: Between work and gaming, (or just gaming, if youtube is their entire dealio) they have very little time to do anything else. Hell, if they want their channels to stay popular (read: Profitable) very few youtubers in general hae time to do much else. And I do mean anything. I mean, let's see, Dan has been consistently single for how many years now?...
That isn't to say playing video games isn't a helluva way to make money, nor is it a bad thing to be famous for. In fact, you don't even have to hit it big to make money. There's this guy from Australia whose username I can't remember, who I honestly would never have heard of if I didn't need help with a quest in New Vegas. The video was pushing only about 1,000 views, and he explicitly stated that those views were basically his living. Then again, maybe shit in Australia is just really cheap? Or maybe he lives in a shack off of canned soup and vegemite? I dunno. I've never actually done it, but I have considered doing a Let's Race with one of my friends just to have something we can show our grandchildren when they ask what we did for fun bac in those primitive years...