In short: You are welcome to try using any web capable device but your experience may vary. You can only use one device at a time.
Fully supported: PCs, Macs, desktops, laptops and modern mobile phones and tablets.
Should/may work: Smart TVs, 8/9th Gen Consoles (Playstation 4, XBox One - with updated software), Chromecast, AirPlay devices (but we can not really help diagnose problems on those devices)
Not supported: budget tablets (Hudl, Kindle) and phones, low powered computing devices (like generic Android boxes and SoC devices) are not supported at all.
Please note: You are welcome to use AirPlay on Macs with Safari and your AppleTV, and Chromecast on suitable equipment, however this use case is not formally supported. We provide live technical support for browser-based viewing only.