The Raspberry PI is a low cost device that can run Castmill perfectly. You can run it on all versions of RPI but the newest devices will able to play content more smoothly and allow for more videos to play simultaneously, so we recommend you to use the RPI 4 model B, but anything from RPI3 and above will work just fine.
You will need a RPI running the latest version of Raspberry Pi OS, and having it up-to-date connected to a display with keyboard and a mouse. If you need help installing Raspberry Pi OS just follow the instructions for "Raspberry Pi OS with desktop" here: https://www.raspberrypi.org/software/operating-systems/#raspberry-pi-os-32-bit.
When the file is downloaded go to downloads using the file explorer:
Right click on the file and choose properties:
Choose the Execute Anyone on permissions:
Now you can double click on the file and click on "Execute":
Finally you should enable the Autostart feature in the player so that it starts automatically when your RPI device powers on: