I may need to rewatch the video, but i felt he neglected that there are multiple mechanisms at work, and that EM coupling is just one; it might have helped to mention that in the practical example at DC, when the switch is thrown, there would be a short pulse of EM energy then as dV/dt is 0 in steady state there would be no coupling.
and as pointed out many times, getting the dimensions correct and expanding to the effect at 1,2,3,4…n meters would have more adequately explained the point he was making.