Hi Mark - I don’t know of any videos, but in general there are a couple of ways that come to mind -
InsertKink in a surface then edit the points at the kink - of course this limits the kink to an isocurve direction. Or, build new surfaces, for instance as outlined here:
http://discourse.mcneel.com/t/adding-a-wrinkle-or-kerb-or-cease-to-a-surface/33053
-Pascal