Strength mode.

The video likely resonated due to its focus on raw physical strength and 'strength mode' concept, which is relatable and aspirational for many viewers. The rapid succession of diverse, visually striking examples of strength creates a compelling and shareable montage.

The video showcases various individuals and activities demonstrating immense physical strength. It features a person carrying multiple large beer mugs, a person flexing a robotic arm, people interacting with a large rock, a person carrying a large bunch of bananas, a person moving a large log, a blacksmith working hot metal, and a person lifting a large log. Finally, it shows a person preparing to lift a heavy object attached to a tractor.