Happened across these looking for information on another post. Library of Congress films of the the Rough Riders and more:
https://www.loc.gov/item/98500909/
https://www.loc.gov/item/98500677/
https://www.loc.gov/item/98500682/
https://www.loc.gov/item/98500670/
https://www.loc.gov/item/98500537/