I saw a previous thread by this same title, but it had been closed for comment. In case anyone was wondering about a 3rd generation Apple TV solution that works, here's what I've been using for nearly a year now:
My media (MP3 audio and MP4 video) is all stored on a share on my RN314 (currently running the latest firmware and snapshot protected).
I'm running an iTunes server based on an Intel compute stick. This is running Windows 10 out of the box, and the latest version of iTunes. It's connected to a powered 4 port USB 3 hub which has a USB to gigabit wired Ethernet connector attached. (Yes, I know wireless is physically more convenient, but copper tends to be more reliable, especially streaming video, at least it has been for me.) I also have a 64 GB micro SD card for additional storage. My hardware is the first generation model, they have ever better ones now. The current model lists on Amazon for $129.00 (model # stk1aw32sc), that's a complete Intel based Windows 10 PC, about the size of a large USB thumb drive.
The iTunes library also resides on a share on the 314 (snapshot protected). This has come in handy a few times, when I accidentally hosed the library. I simply pulled a copy from the latest snapshot and replaced the library. This fixed the problem immediately, allowing me to get on with life.
The compute stick has an HDMI output, connected to an input on my television. I normally use Remote Desktop from my PC workstation for access, but that did require some additional software, as the version of Windows 10 on the compute stick didn't natively support RDP connections, at least not when I bought it last year.
The entire setup runs on less than 10 watts of power. I've had it running 24/7 for about a year now, with no major issues to speak of. It works great, it's power efficient and all sold state.
