Gaming is a really competitive area and by just saying gaming, I don't really feel like watching your channel.
If I would describe my own channel (Which is gaming aswell), then I would say: "It's a gaming channel where I do Guild Wars 2 Community videos from my servers public events". If you look at how I state what my channel is about, then I give some incentive for people to actually know what it can bring you.
Make sure that you somehow in your branding, atleast give some info on what kind of videos you do. I do guides and community videos. And both those types of content have shown to be really beneficial for me and my channel growing.
My suggestions are as following:
1. Experiment and find a style, and a genre of videos that can help you grow while you enjoy doing it.
2. Find out what people can get from watching your videos and what you can offer them.
3. Be consistent in telling or showing people what your channel is about, this can be done in a lot of ways. (Annotations, telling in the ending, end screen in videos and more).
4. Profit?
This is not a guarantee to success, but it's a way that have proven beneficial for me and I think it can work for others aswell. And then, do remember, that in the beginning it can be a bit dull in getting more subscribers. Exponential growth will come over time
