"The issue shouldn't be internet speed as I am with Virgin on fibre with 10mb. "
So what? Whats the bitrate and definition of the files you are trying to stream?
And what else is running on the local network? Whats the source of these 'net TV channels. Most of the ones I've seen have been severely bandwidth restricted, often using peer-to-peer networks
You don't need much in the way of hardware to stream video. We could do it 12 years ago using 8Mb ATi Rage Pro chips and AMD K6-II CPUs. The processing power of even a basic modern machine such as a Notepad with Intel Atom guts is far more powerful than that.