hunter315 said:
There are HDMI switches which let you flip between multiple HDMI sources, they aren't super expensive though you would likely need to nest a few of them to get 25 outputs, 5 in a creative arrangement would get you 16 screens, you would have some lag between whats on the TV and whats on the PC screen if you do start nesting a bunch since you will have some added latency.
http://www.bhphotovideo.com/bnh/controller/home?O=&sku=...
I see many hdmi switches with 16 ports, but they're 16 out, 1 in. I can't find the reverse. Do they make such things?