Powerboat racing was a brand-new sport in 1904. Selwyn Edge initially won the race off Cowes (Isle of Wight) in the British-made Napier Minor as a substitute for the Napier II, but was later disqualified. Clearly the filmmakers thought at the time that they were filming the victor.
Unfortunately the movie Edge's Motor Boat. The Napier Minor is not yet available on HBO Max.