I had looked before without success, but not since early this year. Looking for something else, I found this link to videos at the National Archives, available for downloading.
This is a 9-minute newsreel on the surrender of Japan at the end of World War II, for one example, aboard the U.S.S. Missouri — on September 2, 1945, 62 years ago yesterday.
The National Archives videos promise to be great sources for classroom teachers.