"Butt Kicks" is a video demonstrating a cardio exercise that involves jogging in place while bringing the heels up towards the buttocks, alternating each leg. This exercise targets the quadriceps, hamstrings, and calves, while also increasing heart rate and improving cardiovascular endurance. The video typically focuses on maintaining a steady pace, proper form, variations, and the benefits of incorporating butt kicks into a warm-up or cardio workout routine to enhance leg strength, agility, and overall fitness.