I found this amazing website where you can watch old youtube videos, I mean videos uploaded now but videos of the very old times, past. In fact the oldest you will find is of a 1860 sound recording which is the first in the world.
YTTM.tv – Find and Watch Old Youtube Videos
YouTube Time Machine (YTTM) lets you voyage to whatever year you pick, via the magic of internet video. Each video is hand selected for purity and awesomeness. Step back into whatever era you fancy, the YTTM.tv way!
It is in fact a very interesting web application that, through an interactive timeline that can moved back and forth also allow to view the video referring to a given time period chosen, from 1860 until you reach the present day.