What Patrick said.
1. Get Raspberry Pi and SD card
2. Install this - https://kodi.tv/download/raspberry-pi/
3. Install the mobile app
4. Reboot, connect to wifi
5. Start surfing channels
Took all of twenty minutes when I did this for my dad.
(Of course, I then spent hours downloading extra plugins and connecting it to Dad's paid Kayo Sports account. Don't do that!)