Well first off, if you are into gaming, what games do you like playing?
secondly, if you enjoy playing Fifa for example, try and do something different to other youtube video makers, that way you will gain more subscribers and get more views then if you were to have the same types of videos as other youtubers.
thirdly, only make videos on what you enjoy playing, there is no point in making videos and not enjoy what you are doing, you will get bored very fast, and it will show in the quality of your videos.
With your money that you have, if you are thinking about making console related videos (CoD,Fifa) then I suggest buying a standard recorder, I would suggest a Dazzle to get started, no point in paying $100's on a HD recorder when you have only just started, you would want to get a fan base up first, also no one likes to watch video's recorded with a toaster, so if you get a dazzle, they at least have some quality for beginners.
If you are going to make commentaries, there are some pretty decent microphones you could buy, no one likes to watch videos where you can hardly hear the commentator.
I guess that's a start