I found the following info: what you need to stream media from computers to your Smart TV
"A shared media library - your files must be stored in folders on your computer, external hard drive (attached to your computer or router), or network attached server (NAS) drive. It is best to organize your files in folders for video, music, and pictures. Once you have the files in a media library and the computer or device is connected to your router, the media player has to be able to see it as a source and display the files it finds.
Shared Windows media libraries can be seen by a Smart TV or media player. Devices like NAS drives can store massive media libraries and are typically DLNA certified so they will connect with your DLNA media player, Smart TV, or other connected device.
To be sure that your media player can see the videos, music, and movies you have stored on your Windows PC, you will have to be sure that the folders can be shared. For Windows 7 machines with Windows Media Player, add the folders with your media to your Windows Media Player library. Choose "Turn on home media streaming" under the "Stream " menu. The Windows Media Player can send the photos, music, or movies directly to many Smart TVs or media streamers. Click on the device icon in the upper right corner of the Windows Media Player window and choose the device where you want to play the movie, music, or slideshow. Be sure that the player or TV is turned on so Windows Media Player can see it."