First off, thanks for the kind words! Big post incoming...
As for language and what have you... it's a tough topic. I try not to curse TOO much, not because I have anything against foul language, but it's more like I find vulgarity actually kinda limiting. It's easy to unload a bunch of 4 letter words, it's harder to be more descriptive and clear. I certainly can, and often do, curse like crazy in my daily life when the mood strikes. Like if I'm stuck in traffic trying to get somewhere or I'm playing Borderlands online with friends and I'm drinking? Whew, I sound like my Gunner Sgt stepdad haha. But when I'm making videos I feel like I can do better most of the time. It's not because I'm afraid of offending or that I don't want to limit my demographic, I just think that there are better things to say most of the time.
My target? Probably the people who would be playing the games I record, and I'd wager that's 13 and above. Just like kids shouldn't be playing Five Nights at Freddy's and Conker's Bad Fur Day (which I'll be playing later), they shouldn't be watching a dude playing it. I never want to LIMIT myself as a creator, because I feel like the end product will be limited for what I do. Gaming is a little tricky in that regard. You have the kind of channel that seems like it should be appropriate for all ages, and although it does suck that you had to scrap the DIY bag idea... it was probably for the best. It would have gotten a lot of views, but I feel like it might have betrayed the spirit of what I'm seeing (I seriously want mini chili dogs now haha). Your channel has an awesome "fun for everyone" feel to it. For gamers, though, trying to stay family friendly limits not only what I say, but also what I can show, and I don't want to do that. I have no interest in being a guy like Dashie who is just a cavalcade of vulgarity (but it really, really works for him and I love his videos), but I also never want to find myself biting my tongue because that's going to make the videos stilted and awkward, which is just poison for someone doing improvised commentary.
The internet these days is just so freewheeling that I have no doubts that down the road there will be little kids watching, and although I don't think that's necessarily right, I figure that's on the parents to decide what their kids can and can't watch. I do honestly feel like making the videos family friendly would limit it, because I'd be stopped from playing a lot of games and I'd just SOUND like I'm being overly clean. Markiplier is one of my favorites because, generally speaking, he is a cleaner speaker. For him to make the kinda videos that a five year old could watch, he'd be chopping off TONS of content that would hamstring his appeal with older viewers. A gaming channel friendly for kids would have to inherently BE a "gaming channel for kids".
A 2 camera setup would be trickier for you, yeah, because you're actually filming physical footage. Gaming is a little easier, I have one camera but I record my monitor and just line it up in Adobe.
I hope that answered, haha. It's a BIG topic, and thanks for offering some thoughts about it, because it's something that doesn't get a lot of consideration with gaming channels.