http://mashable.com/2010/02/14/youtube-birthday/

"It’s hard to believe that YouTube, which serves more than 1 billion videos per day, is a mere five years old today. The domain name YouTube.com was registered on February 14, 2005.
...."

'The 20 oldest videos ever on Youtube':

http://www.youtube.com/watch?v=uImk2RgCq_U

via http://www.mikropc.net/kaikki_uutiset/article375171.ece