I have a new Samsung UA55D8000 TV and getting it set up has been fairly easy. It picked up my wifi and identified all the network devises including My Book Live which has a whole lot of .mp4 videos stored on it in the Shared Videos Folder. The TV says “not supported format” when try to open them. Yet when put the same video onto a USB drive they play just fine! Thought it may be the wifi causing the problem so tried a network cable but no joy.
Have posted on a couple of forums so thought would see if there is some bright spark on this board may have a solution!