The first 10 minutes of this workout is focused on the major muscle group of your body then the remaining 5 minutes is done with the so-called "Tabata top-off". The Tabata top-off is done with 20 seconds for each set including 10-second break in between sets, 8 times. Since there are two different exercises for the Tabata routine then this means that each exercise requires 4 sets and 8 sets all in all. It is also advisable to wear your MMA shorts for this 15-minute workout.
Here is the entire walkthrough of the 15-minute workout (you will need weights for this workout):