With 24 frames per second the cinematographic tradition began. It is not arbitrary — 24 fps is the rate at which the human brain perceives motion as smooth and cinematic.
But the real power of video over time lies in the ability to manipulate time itself. Video can stretch a second into a minute, or condense a day into ten seconds. No other medium has this capability in the same way.
Pacing — the rhythm with which images follow each other — is one of the most powerful tools in post-production. A fast edit creates energy. A slow edit creates reflection and emotional depth.