A little off topic but could you advise please...

I have a bar where I show SKY I would like to show a 5-minute PowerPoint presentation every half hour or so. My problem is finding a switch that would automatically change over feed from satellite > pc every half hour and back after 5-minutes. As you can imagine the change (ideally) would happen maybe 20-30 times a day.

Could you recommend a remote that would allow so many macros to be preset? or any alternative solution.

Regards,
Tony Maddocks