system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In old video footage, why do people running seem like they're moving really fast?

I was watching Ken Burns Baseball PBS documentary the other day, and the players look so fast running around the bases.  Why does this happen with grainy, old video from the early 20th century?
gpt
You mean film? The current standard for film is to shoot at 24 frames per second. Back in the day, film was shot closer to 16 frames per second. When we transferred this media to modern formats, the motion appears sped up because it is playing back 24 frames in a second, when in actuality what you see is more than a second's worth of filming.