I know this probably isn't possible but just to be sure. Can you make a plugin that allows a video to be played in-game on a in-game screen?
This is NOT a plugin. And no, this is not possible. Please read this: http://forums.bukkit.org/threads/read-first-what-can-plugins-do.22780/
Might it be possible to do.. something like this: If a player places a picture. It always places one of the 2-wide pictures. And then switches to another 2-wide picture every second. There might be a performance issue? So you'd have to start the timer if a player is in range or something.
yea read that Show a picture to a player (except maps). Show a video to a player (except maps). Push things in a smooth movement like the or the video is shown on a map