This is where I get into trouble because I was trying to ask a simple question without providing all the details - but I'm glad another detail-oriented person has tuned in.
I'm actually quite capable with these things. I have a Silicon Dust HDHR3-CC tuner connected via gigabit to my N-router's gigabit port. My HTPC, also connected via gigabit, has no problems at all maintaining the bandwidth to get the HD channels without issue. But the speed of N just doesn't have enough oomph when you consider attenuation and signal loss and what-not, so I'm looking to upgrade the router. Additionally, I could just plug a gigabit NIC (even a 100-base NIC would be better than WiFi-N) into the back of the NP, but I'm out of ports on my router as well - so I'd have to get my gigabit switch out of the attic and have yet another device behind the couch in the family room, where things need to look at least not atrocious... I'm just looking for the easy path here, and while my NP in the main family room is the desired benefactor from an upgrade, I have another NP in the guest room and a laptop in the far reaches of the house that could benefit from stronger signal and better speed as well. Just trying to keep it simple.
All that said, I understand also that the Nexus Player doesn't support MPEG2 until Android M, but even when I've flashed the Previews onto the device (which have MPEG2 native support built-in finally), I'm certain that the router/WiFi speed is the culprit for the issues I'm having.