Mark Twain's "From the London Times of 1904" had as the crucial plot element a device called the "telectroscope" which functioned as a webcam. It even had sound.
The very first communications satellite came from Edward Everett Hale, (more famous for his story "The Man without a Country) in his story "The Brick Moon", in which light signals could be flashed around the world from the artificial satellite of the title.