I have a TCL Roku TV 55S403 and a Netgear R8000 router running DLNA. All other devices including Win 10, mini Mac and IPads can play the files successfully off the wireless network with no problems. The TV however, can see the server, go through the entire file structure on the server; but as soon as I hit play, it hangs on retrieving and eventually goes back to the main menu. There seems to be some issue between Netgear DLNA and Roku Media Player.
For those that keep asking about codecs and other files differences, I'm having the same problem however I can play the files fine when I pull them from the windows media server on my desktop. It's just the readyshare that I can't pull them from with roku. I can see them but when I try to use one it show file unplayable error. Again only when I try to pull from the usb readyshare on my netgear wndr4500 using the roku. And I can pull the files from readyshare just fine over my wired lan desktop and wireless laptop. I have 3 roku+ and one roku TV and it's the same with all of them. This seems to be a roku/netgear readyshare specific problem.
I may have something that will help some of you. Login to you netgear router via broswer go to advanced and find usb settings near the bottom. In mine I had approved and available listings with my usb drive listed as available. I clicked add and it showed up in the approved list. Now readyshare is working with roku. Hope this helps