...and you can install Kodi on the Fire Stick. To the OP, you might give SlingTV a look for your live TV.
is kodi a media player? I seem to remember putting that on my raspi.
I have been able to stream media content from my Netgear Access Point which has a built in usb port for my little NAS.
The Roku recognizes my shared NAS device.
When fully cutting the cord, I will need to be able to stream fox news, FBN and sports out to the telly in the garage where my hubs is putting in insulation and finishing it off.
I used Sling for a couple of years and recently switched to Playstation Vue - much better.
I have a media room with a 55” flat panel and Amazon Firestick. Works great!
In another room, older 40” fp with Roku and Apple TV. Rarely use AppleTV (latest) as it is really flaky and hard to sync with anything. The V1.0 Apple TV worked better even if more limited.
Using Harmony to integrate all of these and use Amazon HD8 Fire (hacked to support Google Play apps) as a controller.