Take the key events and search those on youtube, google video, etc.
Is this world history or U.S. History. If U.S. history, you'll obviously want to cover the anti-war movement, MLK and RFK assassinations. If it's world history, you'll want to cover the events in Vietnam (Tet offensive, Ly Lai massacre, etc), the May of 68 events in France, the Tlatelolco massacre in México D.F., etc, etc.