American History in Video provides the largest and richest collection of video available online for the study of American history, with 2,000 hours and more than 5,000 titles on completion. It includes commercial and governmental newsreels, archival footage, public affairs footage, and important documentaries (including ones by Ken Burns!).
Here is a newsreel clip available in the collection that describes D-Day. As you watch keep in mind that Carl Beck was one of the paratroopers who was dropped behind the coastal defenses in Normanday. Pretty impressive!