Just watched this video. Good stuff! Got a question though that maybe somebody can help me with. When Dave first measured the voltage across the caps with the oscilloscope after applying the 200mA loads he says he's measuring the ripple current (Around 28:20) when obviously he means voltage (he corrects himself later), but then goes on to say that the two circuits have the same ripple current, when what we are actually seeing is that they have the same ripple voltage.
Ripple voltage is ripple current multiplied by total ESR, so couldn't the two circuits have had different ripple currents but the same ripple voltages if the ESR's were also different? For instance the ripple current of the 10 10uF parallel caps could have been half that of the single 100uF cap, but if that circuit had twice the total ESR it would produce the same magnitude of output ripple voltage. I checked the datasheet Dave linked but it doesn't give the ESR's of the caps.
(5 minutes later)
Looking at it again, the ripple voltage Dave displays is a result of I = C*dV/dT capacitive discharge. ESR would have negligible impact at 200mA unless ESR's were up in the ohms range.