To save you from looking thru all the menus, you can get Ellas TV on AppleTV, Roku, and Android or iOS device, plus MAC & PC web browsers.
Package prices are $35, $45, and $55.
Have a read:
[Link: ellastv.com]

Roku has some additional Greek channels as well, some free.

There is also some free Greek TV apps on Android.
You would have to use an Android TV box to integrate them. Although it can be done with a cheap $25 box from Amazon, I would recommend using an Nvidia Shield for the Android box. It is $179 in basic configuration but is much more stable than the off-brand cheap Android boxes.