Thanks for the effort making the rough video. I'ts a very good idea. Sadly, it could be hard to follow for non native english speakers.
To make it smoother, don't haste. You know what you are doing. The audience not. Give them a chance to follow your thoughts.
The microphone should be closer to your mouth than to the keyboard. Sometimes the clattering of the keyboard was louder than your voice and snuffle.
I know this is not as easy as programming python. But I look hopefully forward to the next video.
Btw., I uninstalled Personal Brain a while ago as I did not manage to use it without the mouse and my Brain was not saved as text file. Good idea, mean product.
I assent, Google Wave may be a good choice documenting sublime.