YouTube Growing by an Hour Per Second
There are 3600 seconds in one hour, so for every second of video you upload to YouTube, there is another 3599 being uploaded at the same time. Google has recently given some numbers about YouTube including that awesome stat. Another stat is that every day, across the globe, there are four billion video views (4,000,000,000). To put this stat into perspective, there are roughly four billion US $1 bills in circulation, it has been approximately four billion years since Mars had liquid water on it, and the Earth itself is only 4.54 billion years old. To put the '1 second is 1 hour' stat into perspective, some Googlers created this video and onehourpersecond.com.
At 45 seconds long, almost two days of video is uploaded to YouTube by the time you finish watching the video.