Did you actually watch the video? Of the three roundhouses (throwing in the Japanese stylist with the front kick was silly - Apples to Oranges...), the Capoeira kick was slower than both the Muay Thai and TKD roundhouses. It did deliver a stronger impact than the MT kick (though since it both traveled at a slower speed and a longer distance, it would seem to be easier to block or evade), but was both far slower and had far less impact than the TKD roundhouse.
So I don't see how it was "weighted" in the manner you describe.
Did you watch the video?
They concluded the capoeira kick was most powerful, even though it was slower and with less force than the tkd kick.