Explore the concept of double integrals in this 26-minute video tutorial. Learn how to visualize and interpret double integrals by comparing them to single integrals, transitioning from single variable to multivariable calculus. Discover the key components of both single and double integrals, including bounds, functions, and differentials. Understand how single integrals represent area under a curve, while double integrals represent volume under a surface. Follow along as the instructor sketches examples, builds equations, and progresses from geometric estimations to summation notation and finally to integral form for both single and double integrals. Gain a comprehensive understanding of this fundamental calculus concept through clear explanations and visual representations.