I enjoyed your video. Basically, I never recorded my process in such detail, let alone made a video of it. Thinking about that.
In addition to your array of tools used I might recommend using a stiff bristle brush for scumbling (I prefer it for precision over the traditional scumbler), also, if it is a soft charcoal, it can be washed with a wet brush. Two other tools I find are essential to my drawing. a kneaded eraser and a electric eraser.
Example where I used these: Krix-Krax Spirit Guide