I ran into the same situation. You can activate this in Windows Media Player. When in Media Player, at the top you will find a tab named Stream. Click on it then click on Automatically allow devices to play my media. This will allow you Vizio Smart TV to see the files. Now comes the hard part which I am still trying to figure out. The Vizio TV will not play movies in the M4V format as it converts it to MP4. The Vizio does not have the codecs to play this format. So Hope this helps you get to the next step. I will post more as I find out more.