Thanks, just bought a refurb from Apple on the tick.
I stand corrected!
I have an answer but I will not share this
Play iTunes purchases? Also, it doesn’t need a second device from which to cast (although you can do the same if you need to with airplay)
If anyone was serious about getting an ATV 4K surely a refurb at £149 direct from apple for piece of mind about it actually being delivered being a better option? I know its more expensive and not new but you get the same warranty and delivered in mint condition anyway.