Seems it uses the plex media server to serve videos to the tv. You can install that from here
. Apparently, there is also an icefilms plugin for it. There's a forum thread about it here.
(BTW...I found that in about five minutes after googling...)
After reading through the thread, it seems there are problems with the plugin, and no mention of the smart tvs... If I were you, I'd prepare myself for some serious searching and forum browsing. Someone, somewhere, likely has the answers you need.