Game Pro Bros
A YouTube channel without subs is a show with no audience also it can become disparaging uploading videos and becoming no fans. In order to get more subscribers you need to place yourself in their place. A subscriber is somebody that enjoys your articles so much they want to learn each time your channel is updated with new content. This is a big compliment to provide someone, so it's understandable that not everyone who views your videos will hop on the subscriber bandwagon. That said, there's something you can do to enhance your turnover and begin upping your subscribers.
You got it right; the easiest way to attract more subscribers is by consistently adding more content to your channel on a regular basis. The more you have available in the sea of YouTube videos, the more likely someone would be to run across one of these and discover your channel.
You will also want to set a schedule for when you release your videos. If people you are adding new content on a regularly scheduled basis, they're much more prone to subscribe then when they see you haven't added anything shortly so when you did it was sporadic.
Communicate with Viewers
Nothing builds a feeling of community better then a content creator who responds and speaks with their audience. If a person comments in your video be sure to thank him or her. If your conversation breaks in the comment section relating to what was posted, chime in and give your two cents. Even if the surveys are less than friendly, thanks them for giving it a watch and ask for some constructive criticism (until they're trolling obviously). Try ending your video having a call to the viewers asking their thoughts on something or perhaps idea for your next video. Having your viewers involved goes a long way in creating a relationship together which will keep them around for some time and spread the great word of mount about you.
Take a moment to analyze similar channels to yours which are already successful. Once you have found several, compose an amiable message explaining a little regarding your channel and what you do. You may then want to suggest exchanging places on each other's featured lists. This will show a hyperlink to their channel from your channel and the other way around. Now this is a big option for another YouTuber to create, and you'll want to hold back until you've got a decent video library built up prior to going around asking people. When they help you are committed and pumping out content regularly, they'll probably accept your invitation as well as your channel will gain much exposure.