Apple
If you use Apple tech and love it, get AppleTV. This box of magic can be set up to run TrilbyTV in Single App mode via the same management tool that looks after your macOS, iPad and iPhone estate.
If Google floats your boat, get a Lenovo Chromebox Micro. This can be managed within your Google Management account, like your Chrome devices. It runs TrilbyTV as a web app (aka PWA if you want to be geeky).
Windows
If you live the Windows life, get a mini PC with Windows installed. A VeryPC H085 box is a great solution. It has no fan and can be integrated into your existing AD Domain and controlled like any PC on your network.
Android screen
If you need a new TV screen, then you can buy a TV with the player hardware built in. We like the screens from Newline or Promethean. The Promethean ActivePanel D-Series is designed for signage and has features like power schedules for turning the TVs off overnight to save electricity.
And more
TrilbyTV Player will work on other Android, Windows and Apple devices. Some organisations use the Amazon Fire TV Stick, which is affordable, but aimed at the consumer market. While not designed for signage it is a budget-friendly entry point, but will need some restarting and managing.