Hi 
You can see from the beginning of the video That when he sculpt,
he can play very flexibly with the mesh. How does he do it?
with addons? if so how can u do something like that without addons ?
I know its Zbrush but still how can u do something like that on blender
could you explain a bit xD
You can move, scale, rotate object with this (especially for graphic tablets).
You can sculpt only one object same time.
If you want add an object, then you must switch to Object Mode.
If you want sculpt multiple objects, then you must Join (CTRL + J) this objects.
And you can use Skin Modifier.
