Do I need a WD TV Live player to play My Book Live Duo content on TV?

If you have a smart TV, a media player, blue-ray player, ps3, etc, then all you need is the MBLD. If you have an older TV only and none of the other equipment, then the WDTV would be a better option. Also, the MBLD is not WiFi enabled, however, if you have WiFi on your home network, you will be able to access the MBLD over the network. Hope this helps, if not, there is a lot of information in this forum to assist with your decision making.