[blacklion]

IPTV from your ISP is typically multicast (even if your connection is point-to-point), and if you have more than one network behind your router (for example, you have separate networks for wire clients, owner's wifi and guests wifi) you need to understand hot it works to setup your router correctly that you can watch IPTV on any device in any of yours networks.

[486sx33]

What would be great is if there was a “box” I could program 50 or 100 digital channels to IPTV channels and just flip channels on the tv and the box changed IPTV sources. anything like this that’s consumer grade available that works with M3U playlist

[blacklion]

In the theory, if you install DLNA renderer/controller (player) on TV you could make appropriate DLNA media source from VLC or, maybe, ffmpeg.

Put it on RPi (as it could skip transcodnig and pass media streams as-is) and put into the box :)

We are on HN, after all!