Rather than sending 25 video streams from single machine to all those tablets it will probably be easier and much more efficient to just open those webcam strea

Rather than sending 25 video streams from single machine to all those tablets it will probably be easier and much more efficient to just open those webcam streams / websites directly on the tablets, they are able to render it directly. For remote control just serve a simple iframe + javascript to poll for changes. PS: Nice idea, seems like something you would see in a stereotypical hacker movie :)