The Great Martian War
As historical footage / CGI mashups go, this one takes the cake! Using World War I archival footage, CGI, and probably some reenactment footage as well, this video shows what a real Martian War would have looked like in 1914.
The footage is from a History Channel mockumentary called “The Great Martian War” which I apparently missed seeing, somehow. If anyone knows where to get the show, let me know!