This is good.
Using subtitles is a great idea, especially for people who can't hear so well.
But in some parts of the vid, the subtitles text, disappear from the screen too quickly, before you can finish read it.
It should stay on screen for a while, then after a fixed time, switch to another subtitle text.
At least you did that correctly, in some parts of the vid. :D

This might be not be always easy to do, but zooming into certain parts of the screen, might help.
Especially when you were showing the sidebar icons, where the Samples and Plugin instruments were located.

What you did after 2:20 secs was nice. Hovering the mouse over the different windows, to show people
what each one does, is a good idea.

Overall, nice tut.

I actually found the name Cubiicle, to be very catchy. :D
But the name Teramiiko, is nice too.