Watched a few videos, my first impression is that you seem to know what you're doing in regards to video quality, so obviously no complaints there.
'What could go wrong' is a great idea for a series by the way, just thought I'd point that out
![Smile :) :)](/styles/default/xenforo/smilies/smile.png)
In my opinion you should definitely make sure you continue that series. Maybe take suggestions for topics to add more interaction with your subs (think you did ask for comments, can't remember though)
Your commentary is fine, a bit of random stuttering/slurring that you might want to work on but honestly I can't see much wrong with your channel. I know it can be damn near impossible to record a flawless voiceover, I'm no expert myself, but just do all you can to prevent potential issues. For example, if you're finding yourself pausing because you need to think of what to say, try writing down the main points you want to talk about before you talk about them.
Otherwise just keep doing what you're doing and don't give up