I noticed that TGC uses twitch to stream tutorials. There is a new service offered by Youtube, which I only just discovered today, which might also be useful to check out:
https://gaming.youtube.com/
It should work really well with your Youtube Channel as it would let all your subscribers know your going live. I find at times its hard to drive everyone to twitch. But then again I'm not an extreme game streaming type. I will however give this service a go sometime soon that I have reached nearly 500 subscribers. I think TGC should consider as well

i7 -2600 CPU @ 3.40GHz - Windows 7 - 8GB RAM - Nivida GeForce 420 GT