As helpful as your tutorials are, I see room for improvement, and have listed a few suggestions. This is my attempt at constructive criticism, and not meant to be insulting in any way. (Just my honest opinion. You can tell me to kiss off if you'd like.) :)
Speak more softly. You're practically shouting in some of your videos.
Reduce the length of your tutorials. They're far too long. I noticed a lot of mistakes being made during your tutorials, which increases their length, as well as my aggravation factor. I only want to know the correct way of doing things. A quick tip on what to watch out for, instead of leaving the mistakes in the videos would save on time and aggravation while following along.
Speak less and get right to the point. You speak very rapidly and say a lot of words, but much of what you're saying isn't relevant to the subject matter. The first few minutes of each of your tutorials (that I've watched) teach nothing. This is time I can never get back. I want to create a game, not listen to chit chat!!! Let's get to the info without all the the small talk. :)
I'm not sure if this was in one of your videos or not, but I watched a tutorial that was about audio controls, and the instructor spoke right through the entire audio example, so I never got to hear the sound coming from the game in the example. It's things like this that make for really bad tutorials.
Anyway, thanks for making the videos. I'll keep an eye out for any new ones you might release.