Regarding PSoC Creator 4.2 and a dual-core PSoC 6 device (i.e. BLE Pioneer Kit) -- if all I want to do is program (not debug) does it matter which "debug target" I select (the M0 or the M4)? This should be explained somewhere! It is not in the video (which is otherwise quite good).
It does not. The CM0+ core and CM4 core share memory, so selecting either with program the flash for both.