The key to weight loss is changes in diet, exercise helps but is more important for general fitness,
rather than squats and jogging on the spot can he get out side and join a sport or ride a bike ?
If he must be inside, 15 minutes with a skipping rope will burn more calories than jogging on the spot. In addition to squats, other bodyweight exercise options to include in addition are pushups, crunches, planks, chair dips etc.