Maybe you better do a research which kind of videos people like to see?
I think that you have to pay attention on everything! even if that means to control your desk lamp for better image of urself in video! as for the content, one thing u must know... it's never good enough! also, great channels have strong identity! think about how you imagine your channel in 2 years, and than, think about if u find that content interesting enough... At least, think about what is the image you want to have with your channel in future.
When you have clear picture of that, than, you should build ur skills to create that image. Maybe even try to take something from the channels you love, and use it in ur. when you know what you need to achieve, then ull know what u need to improve in order to create that image... Aaaand finally, if u have strong identity, that is recognized with dozens or hundrets of ur material, u'll get ur subs, and confirmation that u r doing good stuff!
DISCLAIMER: Of course, this is just an opinion.