Video of Nirvana Playing at a Radio Shack in 1988
Nothing like watching old video of a band before they made it. Especially a band that is as iconic as Nirvana. It reminds me of watching the old Who Then Now documentary on Korn from back in the day where it shows the band playing at a house party.
If you think about it though, items like this are either going to become more and more rare, or more and more common. It could become more rare because people will have all kinds of footage from band's early days. So the early footage will have already bit the Internet, so it won't be something that surfaces later on. But it could also become more common because more people will have the ability to record early shows, and maybe they make their way to the web, but don't get shared as much, and end up not being seen.