who produced it?
American Mutoscope and Biograph Company
Sherlock Holmes Baffled
The film was produced by the American Mutoscope and Biograph Company and was intended to be shown on the Mutoscope, an early motion picture device, patented by Herman Casler in 1894. 
what is sherlock holmes baffled? A very short American silent film created in 1900 when was it released? 1900 who did the title role in it? UNANSWERABLE was it based on any novel? No
wiki:3894274
Sherlock Holmes Baffled [SEP] Production
The film was produced by the American Mutoscope and Biograph Company and was intended to be shown on the Mutoscope, an early motion picture device, patented by Herman Casler in 1894. Like Thomas Edison's Kinetoscope the Mutoscope did not project on a screen, and provided viewing to only one person at a time. Cheaper and simpler than the Kinetoscope, the system marketed by the American Mutoscope Company quickly dominated the coin-in-the-slot "peep-show" business. The Mutoscope worked on the same principle as a flip book, with individual image frames printed onto flexible cards attached to a circular core which revolved with the turn of a user-operated hand crank.