In this video the strength portion of the workout is back squat. Once you have completed your squats you will move to a metabolic Crossfit workout called Cindy.
The workout is as follows:
BB Back Squat 3-5 sets of 6-8 reps at the heaviest weight you can do with good form for those reps or 75% of your 1RM if you are more advanced and you know what your 1 rep max is.
As many rounds and reps as you can get in 20min.
Detailed instruction on how to perform Back Squats: http://youtu.be/QGaRePzXdgc