http://www.google.com/hostednews/afp/article/ALeqM5jbG1BC7l8u9Njm7Yo9QV7GLN4uMA

How much is per second?

Official blogpost:

http://youtube-global.blogspot.com/2010/03/oops-pow-surprise24-hours-of-video-all.html

Juha-Matti:

24 hours of material per minute
- is the same as -
24 minutes of material per second
- or –
1440 days of material per day

In other words, if YouTube had 1440 people watching it 24 hours per day, they could only just keep up with new content. Each new video would only be watched by one of those 1440 people.

Thanks for counting these examples :) And sharing more examples.