Today, people use mobile devices in ways that open new possibilities for documentary practice.
With the rapid proliferation of video networks in non-traditional spots such as movie theaters, bars and restaurants, gas stations, health clubs, and other place-based venues a category entitled "fourth screen" was created.
With the proliferation of technology, digital signage has expanded in this "fourth screen" section to include movie theaters, gas stations and health clubs.
[1] Other leaders in the "fourth screen" marketplace are Gas Station TV and Zephyr Media Inc; GSTV generates over 32 million digital signage impressions every month and Zephyr Media Inc on their US Army Network over 25 million digital signage impressions a month.
They go on to outline the various companies that are leaders in the space that include screenvision, NCM, Capitvate, GSTV and IndoorDirect.