Found History: Unintentional, unconventional, and amateur history all around us. Author: Tom Scheinfeldt, Assistant Director of the Center for History and New Media at George Mason University. Scheinfeldt also co-produces the Digital Campus podcast, which provides a biweekly look at issues of new technologies in universities and libraries. I just listened to episode 2, in which Tom provides two compelling examples of how YouTube can provide you with hard-to-find, historical video footage from public domain and amateur sources.
Like any blog, you can read Found History by periodically visiting the site or by subscribing using a feed reader or by email. Instructions are presented on the site.