Picking up from pt1, in this video Amar covers (among other things): root signatures, root parameters, root arguments, root descriptor, root constant, shader visibility, static samplers, resource binding hardware tiers, root signatures with bundles, descriptor creation & copying, compute vs. graphics root behavior, ExecuteIndirect state changes, root signature authoring and management, HLSL root signature syntax and more.
The full slides (with audio) mentioned can be found here: http://1drv.ms/1Nn4cml
Part 1: • Resource Binding in DirectX 12 (pt.1)
Part 2: You're here!
Part 3: • Resource Binding in DirectX 12 (pt.3)