In 1916 a filmed called 20,000 Leagues Under the Sea, distributed by Universal was the first movie to film in actual underwater. For the location of the underwater, the team choose the Bahamas for its reputation of unusually clear water, and while no actual underwater cameras were used for the film, two brothers under the name, George M. and J. Ernest Williamson, setup a camera system by using watertight tubes and mirrors to get some actual underwater footage from a real life ocean.
In 1913, Nils Granlund produced the first ever trailer in an American theater. While this is not the first time that a film was used to advertise a product, for as early as 1897, the first time that a film was used for an advertisement was for Admiral Cigarette with the tagline, "We all smoke", but this was the first time that a film would advertise for another film in this case the trailer was for an upcoming Charlie Chaplin film in 1914.
Finally in the late 1900's Russia now joins the cinema action as well. Again while a Russia has used a picture camera before the cinema started, in 1908, the first ever Russia narrative film Stenka Razin was release to the public directed by Vladimir Romashkov. Not only that, but also in Russia we have some of the earliest known stop motion animations by a man named Ladislas Starevich, born on August 8, 1882, Starevich was best known for this stop motion work, which he used insects with wires and would created some narrative stories with the character, making this the first time that an animation, in this case stop motion animation, would have a narrative story. Starevich is another one of those animators that not many people talk about and it's a shame, because he's stop motion work is really good. Starevich passed away on February 26, 1965, leaving a bit of legacy behind him and his animated work.