True, it would be even better if actual electrical usage was logged. Still, let's not pick on the guy for sharing a basically honest and informative video.
The idea of using radient and specific heat makes a lot of sense. And the quick cool down means quick respons time, probably due to minimum thermal mass. That means there's little energy wasted if you work for a few minutes or a few hours.
I get cold when I sit too long in front of my computer, too, and it usually means I should get up and move around before my blood clots spontaneously. Someone told me that your metabolism shuts down if you sit still for too long, which is bad for most of us. I can't reference it, but I do know that office workers are less likely to get an injury if they take a quick break to stretch and walk around ever 2 hours.