demultiplexer

I'm attempting to integrate a video playback patch with a demultiplexer and I'm somewhat at a loss. The issue that I'm running into is how I can have this video playback patch play every 30 minutes or so, and return to the normal cycle of patches that the demultiplexer is driving.

I thought about having a LFO patch (square) drive it every 30 minutes or so (output to Start and the sprite patch), but I'm not sure if this would be the best option.

Any ideas?