Here's my dual-purpose movie screen (actually a small Android tablet on a scratch-built stand) in action in the park, which displays a slideshow of billboards between movie features, or in the alternative trailers for coming attractions (currently, "The Blob" and "The Sound of Music" -- how's *that* for a double feature!):
[BTW, to make the video shorter, I set the slideshow to change billboards every three seconds, but normally they each are up for ten seconds or longer. Or, I can run video trailers for upcoming movies.]
