It's not the number of exercises you do or even the variety, that matters. It is the intensity and the load they can place on the muscle groups that move the body that make the difference by activating the body's adaptation response. As you're guessing right now, Power Bolt does just that. At less than three minutes per set it uses just two exercises to achieve an almost total body workout. Go high on your Burpees, work really fast with your High Knees, mainatin perfect form throughout and don't forget to land on the ball of the foot, to absorb the impact.
Extra Credit: 1 minute rest between sets.