When I "worked" at a public access TV channel, we used a big PowerPoint deck for most of the unprogrammed roll. It was pretty simple too. A G4 cube would just h

When I "worked" at a public access TV channel, we used a big PowerPoint deck for most of the unprogrammed roll. It was pretty simple too. A G4 cube would just have a ppt on loop, and output it's video into the switcher. When you needed to update the roll, you just replaced the file over the network, and reloaded the application. You were supposed to do this when the switcher was showing some other program, but occasionally someone would forget, and a video of the OS X 10.1 desktop would go out on the air. Apparently they used hypercard before PowerPoint, but when Apple pulled the plug, they had to move over