U.S. National Archives and Records Administration

"Of all documents and materials created in the course of business conducted by the United States Federal government, only 1%-3% are so important for legal or historical reasons that they are kept by us forever."

"Those valuable records are preserved and are available to you, whether you want to see if they contain clues about your family’s history, need to prove a veteran’s military service, or are researching an historical topic that interests you."

These archives have joined with Google to make selected historical videos available to the public. History fans like me will have a party here will all the material. Whether you're researching, or just killing time on a lazy weekend, this is worth bookmarking.

I tried to view a few via Google, but kept getting a "video not available, try again later" message, but it's new, so give'em time.