I would be astonished if 7 minutes per day provided even a measurable percentage of the benefits of exercising 5 hours per week (say 3.5 hours lifting and 3 30 minute runs).
The nytimes article listed in the parent, which is what sparked the 7-min workout craze, discusses and links to the study. I am not going to get into too much detail, but the general idea is that working a bunch of different muscle groups at high intensity for short periods gets you most of the benefits of longer endurance based workouts.
Is there any evidence that it can?