It is most interesting that the so called "Filipinos", in this short film, were all played by African Americans and not by Asians.
The explanation, given in an interview on Turner Classic Movies, was that the makers, like most Americans of that day, did not know enough about the Philippines or its people to portray (stereotype ?) them, but they could portray them in the same light as African Americans, a subject that they were more familiar with.
The victorious "Americans", on the other hand, were played by white Americans. The latter were members of a national guard unit (TCM).
The film itself is interesting in that it was one of the first attempts at supposedly portraying "current or historical events", albeit a long stretch from the historical truth.
I found it an interesting few minutes, of my time, that tells me more about the early history of American cinema than of the war between Spain and America in the Philippine Islands.
Blair Stannard