Need Help with a Prank

So I'm going to be out in the middle of nowhere with a big group of people. There isn't even cell phone service out there. I want to set up a sign saying free wifi and a router that offers wifi but no Internet. I'd like to redirect everyone trying to surf the web to a cat video. I have a router and computer and i can install Kali or windows. I tried making an html and use apache that would play the video but it doesn't seem to want to play in Iceweasel when I test it. I saved the video in where the html txt is. Plus I'm really new to linux so I don't even know how to install another web browser to test. Worst case scenario is i can set up the router just with no Internet.