This video includes a buffet of various topics, the most clinical of which is the discussion of short-burst exercise as a convenient technique for optimizing results-per-time-investment.
Corrected math per 8 (not 6) sets of exercise:
Each set: 6 seconds x 8 repetitions = 48 seconds per set
Each session: Repeat for 4 sets = 192 seconds = 3.2 minutes of effort
Per week: Repeat twice weekly = 6.4 minutes per week
Anyone and everyone can "afford" 6 minutes of exercise per week to improve strength, lower cortisol, and raise testosterone