I just scanned through some of your videos and looked at your channel, and here's what I think.
Your content is good, and I like your personality. What I would look into doing is upload more videos on a more regular schedule. From the looks of it, you've been uploading for about a year, but there's only one page worth of videos on your Youtube. That suggest a very low frequency in uploads and you seem to upload at random intervals.
You don't have to upload every day, or even every week, but you should be clear to your audience about how often you do upload on average. Epic Rap Battle, is one of the largest youtube channels, but they only upload a couple of times a month. This is acceptable because they've communicated to their viewers that their production is of higher than average quality, and it takes time to develop and produce.
I would also recommend sprucing up your thumb nails as well. Some people have already commented that they're a little bland, and in all honesty it is some what true.
Other than that, keep going! I like your channel and subed