The site's creator told MacRumors that he wanted to get them online in time for Steve Jobs' birthday on February 24.
I'm a long time Apple enthusiast and throughout the years have gathered every single Steve Jobs video I could find … To commemorate Steve Jobs birthday (Feb. 24th) I decided to put all these videos online and make them easily available for all. I believe it's the most complete archive available.
Highlights include Steve's first TV appearance, where he told the crew he was about to throw up from nervousness; the launch of the Macintosh, including the famous 1984 video and Jobs making fun of IBM; and the launch of the Think Different campaign. It also includes some amusing compilations including Steve Jobs' Funniest Moments and Every 'One More Thing' Moment, all 31 of them.