The Library of Congress has online a collection of motion pictures documenting the Spanish-American War, a part of its “digital collections” section. These brief movies are all from the period. Three or four are re-enactments (and the LOC carefully labels them as such) the rest are the real thing. That said, cameras were clumsy then and cameramen disinclined to expose themselves to gunfire, so don’t expect combat footage.
Until I stumbled across this, I was not aware that there were any motion pictures of that war. I think you’ll find them interesting.